Thứ Ba, 12 tháng 2, 2013

How to Use Content Curation to Add More Useful Content to Your Blog

Content curation is a popular trick used by bloggers and online publishers to increase the amount of content they publish, share great content from across the web with their own audiences, and add personal commentary to hot topics discussed on other websites.
You can curate content that you think your audience would find value in, add your own commentary, and publish it on your blog. As long as you don't plagiarize, break any laws, publish duplicate content, or fail to attribute the source with a backlink to the original content, then content curation is a viable way to bring interesting content to your audience and increase your blog post publishing schedule. Following are five easy ways to curate content on your blog in a useful, legal and ethical way.

1. Publish Editorialized Content that You've Curated

It's important to understand the difference between content aggregation, content syndication, and content curation before you can effectively curate content to publish on your blog. Here are some simple explanations of each:
  • Content Aggregation: When you gather links to content and provide nothing else but those links (and perhaps content titles) in a single place, you're using content aggregation. Alltop and PopURLs are examples of content aggregation websites.
  • Content Syndication: Syndicated content is aggregated and redistributed (in whole or in part) for consumption or publishing through a third party. Sites like Newstex and NewsCred are examples of companies that offer varied content syndication services.
  • Content Curation: When you review content from a variety of sources, gather links to those sources, share descriptions of that content, add your own commentary to that content, and publish all of those pieces in a single location, you're curating content. While aggregation and syndication are primarily automated processes, curation is not. True content curation requires human intelligence, interpretation, and intervention.
With that definition of content curation in mind, you can read, watch, and listen to content from a variety of sources that you think your blog audience would enjoy and benefit from, collect links to the best content, share a snippet from the content, add your commentary, and publish it all in a blog post. Just don't forget to always cite and link back to the source to provide appropriate attribution.

2. Publish Curated Round-up Blog Posts

One of the most popular methods of leveraging content curation to increase your blog posting schedule and to share interesting content from across the web with your audience is by publishing round-up blog posts. For example, you could publish a weekly round-up post where you share links and descriptions of great content from multiple sources about a specific topic. You can even add your own brief commentary with each link. This is a great way to not only share great information with your audience but also to show other content publishers that you like what they're doing. Think of it as a step in developing a relationship with other publishers whom you respect.

3. Publish Slideshows to Highlight Curated Content from Multiple Sources

Slideshows are visually appealing and can boost page views for your blog because visitors have to click through each page in the slideshow to see all of them. If your audience likes slideshows, they're great for sharing curated content. Rather than just publishing a blog post filled with a list of links and commentary, turn each of those links into a visual slideshow where each link gets its own image and commentary page. Slideshows can also easily be repurposed into Twitter updates, Pinterest pins, and more.

4. Embed Curated Content on Your Blog

There are a variety of tools that can streamline the content curation process, and some of those tools enable you to embed the content you curate on your blog. Typically, the formatting is done for you, so the process is quick and easy. You just pick the sources, add your commentary to each, copy and paste some embed code into a blog post or blog page, click the publish button, and you're done. For example, tools like Storify and Rebelmouse both offer easy ways to embed curated content on your blog. You can see an example of curated content embedded into a blog page using the Rebelmouse tool on Women on Business.

5. Curate Content into an Online Video

Curated content doesn't have to be published on your blog in written format. You could create a video that includes your insights added about a single piece of curated content or multiple pieces of curated content, publish it to your YouTube channel, and embed it anywhere on your blog. Just be sure to include the URLs to all of your sources within the video and in the written description of the video.
A post from weblogs.about.com

Extend Your Content Reach and Increase Traffic to Your Blog

10 Ways to Increase Traffic to Your Blog by Repurposing Content


You can easily increase traffic to your blog and extend the reach of your content by repurposing your blog posts. Content repurposing is a common tactic used by content marketers to build brands, and you can use it to build your blog, too.
However, it's important to understand the difference between repurposing content and republishing content. When you republish content, you simply copy it and publish duplicate content on multiple websites. This is a tactic that Google frowns upon and your blog could be removed from Google search rankings if you republish content. However, when you repurpose content, you're tweaking your original content and enhancing it for different websites. In other words, you're offering the same "story" in different ways. Following are 10 easy ways to repurpose your blog posts the right way so you can increase traffic to your blog.

 

1. Social Media Posts

When you publish a blog post, you can repurpose it into short-form content such as Twitter, Facebook, LinkedIn, and Google+, updates. Don't just publish the repurposed content on your social media profiles. Be sure to publish it in relevant groups that you belong to as well!

 

 

2. Email

Email newsletters are a perfect place to repurpose content. Share a condensed version of your blog posts and be sure to include a link to read the full article on your blog for all the details. Don't forget to include a snippet of your best content and link to that content in your standard email signature line, too.

 

3. Pinterest

If you include interesting or useful images in your blog posts such as photographs, charts, and so on, create related pinboards on your Pinterest profile so a broader audience can see them. Pin the images directly from your blog posts, so a link to your original post is accessible through the pin.

 

4. Video

If you publish interesting blog posts that people find entertaining and meaningful, why not turn them into short videos, too? Some people prefer to watch videos rather than reading text. Make sure they don't miss your blog posts by filming brief videos to sum up your post content and publish them to your YouTube channel.

 

5. Infographic

Infographics are extremely popular, so why not jump on the bandwagon and turn some of your blog posts into infographics? With some data and some creative flair, you or an infographic designer can put together a visual piece of content that is highly shareable.

 

6. Ebook

If you write about a focused topic repeatedly, you can bundle some of your related posts together and turn them into an ebook. Offer the ebook for free download to increase traffic to your blog and gain more readers!

 

7. White Paper

If you publish a lot of instructional information, research posts, and data on your blog, then a white paper is a great way to present related data in a single place.

 

8. Press Release

If you publish any blog posts that are newsworthy about you, your blog, or your company, you can turn those posts into press releases to give them wider exposure. Submit them to free press release distribution sites (or paid sites if you have the budget) to help them spread even wider.

 

9. Presentation

Just as you can turn a bundle of related blog posts into an ebook, you can also turn them into a presentation. Use a tool like SlideShare or Brainshark to create a visually appealing and highly shareable presentation.

 

10. Forums

Do you participate in any online forums and message boards related to your blog's topic? If so, you can repurpose your blog posts and turn them into useful forum posts and responses to other members' posts. You can also include a snippet of your best content (with a link to the original source) in your forum signature.
Original post in weblogs.about.com/

Chủ Nhật, 10 tháng 2, 2013

Simple Ways To Get More Social Media Shares

Social media is one of the best place to discover new friends and blast our blog with traffic. Social media shares can help our blog get flood with traffic in very less time. We have seen many popular bloggers on social media sites like facebook and twitter and getting loads of social media shares and huge traffic to their blog and making thousands of dollars with that traffic. As we all know that in today’s blogging world the more social media shares any blog have, the more well it will rank in search engines and finally more money.

Everyone of us uses social media sites like facebook, twitter and many others but very less of us are able to get traffic to our blog and even no social media shares. If used in any proper way and if your posts keep on getting social media shares every time you post any article in your blog, it can help you flood your blog with traffic. Today we will share how you can get more social media shares and get traffic with the help of these social media shares.

How To Get More Social Media Shares

1. Facebook fanpage can help you get loads of traffic to your blog. Try to make a fanpage for your blog and share every post and article you write for your blog. The more fans your page has, the more social media shares your post will get and finally more money for you. You can make a fanpage at G+ also and get lots of social media shares from this social network for your post. The more social media shares your post will get from facebook and other social sites, the more better it will rank in search results. So try to get more social media shares from these sites.

2. Another trick to get more social media shares is to create a popup in your blog and show it up every time any visitor lands on your blog. The more popups you create, the more social media shares you will get and finally more traffic. Don’t try to create many more popups as it may frustrate your readers and force them to leave your blog.This method works perfect to get more social media shares for your blog.
social media shares

3. Post title is everything that matters. Try to make title of your blog as much interesting as you can. Posts titled like “Top 10″ or “Best of” fetch readers attention and you can get more social media shares. The more catchy and interesting your post title is, the more social media shares you will get.

4. Please with your readers to get more social media shares. This trick works perfect. After writing an awesome full of quality content , you can request your readers to share your post on any social media site. If your readers like your post, they will surely share your post and you will get more social media shares.

5. This is another and final trick to get more social media shares for your blog posts. Try to engage with your readers and don’t spam. If you have any fanpage with lots of fans, don’t spam. You should share only one or two posts everyday. This way you will not get more fans but more social media shares also.

Original article in idealtechblog.com
Simple Ways To Get More Social Media Shares

The Ultimate Guide for Keyword Research

Whether you’re you building a site or a blog, keyword research is definitely the first thing you need to consider. You can be sure that if you target the wrong keywords, you will fails for sure. The information presented in this guide will help make your keyword research easy and fun. We’re going to concentrate on the main factors to which we need to pay special attention.

There are two types of optimization: On Page and Off Page. But, before thinking about On Page and Off Page optimization, you have to research your keywords. There are two types of keyword research. The first type is for SEO purposes, the second type is for PPC purposes. Here, we’re only going to discuss keyword research for SEO purposes. Although there are similarities between keyword research for SEO and for PPC, they aren’t exactly the same. Actually we will talk about where we want to rank, not how to not how to optimize a site.

First, let me explain you what is the difference between main keywords and long tail keywords. Most of you in the SEO business will already know about these terms, but we’re going to start from the beginning, so I’ll be explaining them again.

Main keywords are words such as, “money”, “business” and other. In most cases, these keywords have a lot of traffic, but the problem with them is that they aren’t very targeted. The main problems with these keywords are:
  1. It’s not exactly clear what people are looking for when they search for these keywords.
  2. It’s not easy to rank for these keywords because of all the competition.
Long tail keywords are phrases such as, “how to make money online”, “how to make money with paid surveys”, and “legitimate paid surveys” and other.These types of keywords are different from main keywords.For these keywords we know that:
  1. They are easier to rank for.
  2. They have targeted traffic because it’s clear what people are looking for when they search for these keywords. For example, if someone types “money”, it’s not clear what he’s looking for; however, if someone types “how to make money with surveys”, it’s obvious that he’s looking for a way to make money with paid surveys. I can guarantee that you’ll make more leads, sales, or Adsense clicks per 1000 searches if you rank for long tails keywords instead of ranking for main keywords.
  3. The only one problem with long tail keywords is that they don’t have too much traffic. It’s obvious that you won’t drive a lot of traffic from one long tail keyword phrase, but you can target a lot of long tails. You can target 100 or 1000 or even more.Believe me, you won’t be making a mistake.
Now, I’m going to give you an example with my blog, which discusses online surveys for money, so you can see how this works. In this example we will use it to analyze the situation.

I know very well that I can’t rank for search term like “surveys” and “paid surveys” because they’re too competitive, but I CAN rank for keywords like “legitimate paid surveys”, “surveys for money legit”, and so on. These are long tail keywords, and if you check them, you’ll see that I rank for them in top 10. They don’t send me insane amounts of traffic, but I DO make money because they have traffic and it’s clear what people are looking for when they search for terms like these.

Site Structure

Let’s talk a bit about site structure before we continue with keyword research because site structure and keyword research are closely related. Before you think about your keywords, you have to think about the structure of your site. The best way to structure your site is to optimize your main site url for your main keywords and your pages (or posts in my case) for long tail keywords. As I have mentioned, ranking for main keywords is much more difficult. The right site structure is to target your main keywords on your home page and your long tail keywords on your pages or posts.

If you check my blog, you’ll see that the main blog url doesn’t rank very well, but my posts do. Let’s check one of them: “3 Reasons You Should NOT Pay For Surveys”. It can rank for “legitimate paid surveys”, “legitimate survey”, “surveys for money legit”, and so on, and THAT makes me money. Another post is optimized for keywords like: “how to avoid scams”, “ways to avoid scams”, and so on, and yet another is optimized for “paid surveys free registration”, and so on.

This is the right formula to make money.
Now let’s discuss how to find the right long tail keywords.
If you only pick keywords you like, you’ll be wasting your time. You have to understand what keyword factors to pay attention to, which we’ll be discussing here in detail.There are 3 main criteria that you have to use for any keyword:
  • The number of searches from Google Adwords.
  • The CPC from Google Adwords.
  • How competitive the search term is.
The combination we’re looking for is ‘more searches, higher CPC, and less competition’.

The Number of Searches:

Log in to your Google Adwords Suggestion Tool and type in whatever keywords you like. There you’ll see Local and Global searches. Local means it’s only for the country you’ve chosen; Global means worldwide. Think about whether your business is targeted to a specific country or to the whole world. If you want to sell something worldwide, then look at Global. If you are offering something only for a specific country, use Local. The more searches you see, the better. This means you’ll get more traffic if you rank for those keywords.

The CPC:

This is what people pay per click on Google Adwords. This is a very important criteria for us to consider because it shows us how much money people are willing to bid for a keyword. Higher CPC means more money. Let’s say you see a keyword with 1000 searches per month and a CPC of $10. This will be much better than a keyword with 1000 searches per month and a CPC of only $0.30.

The Competitiveness:

Now we have to see how competitive our search terms are. This is probably the most important part of this guide because it’s the part where most people fail. It’s easy to find good keywords with good CPC, but if they‘re too competitive, then it may be impossible to rank in top 10 or, at the very least, it’ll take a lot of time and effort. This is why we have to understand how to check the competitiveness of a search term.

First, let’s talk about what criteria NOT to use.

Many people just type their keywords in Google and check the page rank of all sites that rank in the top 10 as well as the number of overall results for the term. Believe me, doing it that way will only waste your time. Don’t use Page Rank and the number of overall Google results because they won’t help you very much. Actually, if you see too big difference between these numbers, that may be considered a useful factor. However, it’s ridiculous to think that a niche with 1 million results is less competitive than a niche with 3 million results. The information provided below will help you to understand how actually to evaluate the competitiveness of every niche.
Here are the factors you have to consider when checking the competitiveness of a search term :

On Page Competition Factors

Go to Google and type: allintitle:Your Keyword
This shows us how many people have included that keyword phrase in their title. Why do we need to know this? Actually, from the stand point of On Page Optimization, we know that the title tag is one of the most important factor. If we know how many pages have included a specific keyword in their title, we can tell how many people are actually targeting this keyword. In the example I showed you above, it might be possible to see that the keyword with 1 million searches has 10,000 allintitle results, and next keyword with 3 million searches has only 1000 allintitle results. Try to run this search for your main keywords and any long tail keywords in your niche to see what a big difference there will be.

For example, try:
allintitle:surveys
allintitle:legitimate surveys for money

Do you see the difference? Do you see how many people are competing for “surveys” and how many are competing for “legitimate surveys for money”? It’s obvious that targeting “legitimate surveys for money” will be a thousand times easier than targeting just “surveys”.

Off Page Competition Factors

Go to Google and type:
intitle:”Your Keyword” inanchor:”Your Keyword”
By typing this, you’re able to see how many pages have this keyword included in their titles and also have links with this anchor text. Everyone knows that Google ranks sites based on the number of links these sites have. One of the main factors of these links is the anchor text. Actually if you want to rank for a specific search term, you have to get links with this anchor text. Running this test shows us how many sites compete Off Page for a keyword, how many of them have this keyword in their titles and as well as links with the keyword in it. Smaller numbers mean less competition.

Backlink Check of the First Results on Google:
The next thing we want to do is to check the backlinks of the first page of our search results. Just go to any backlink checker tool and check how many links the first several results have. Think about whether or not you can you get the same amount of links or even more.
Actually if you see too few results when running “allintitle” and “intitle inanchor” you may not need to check the backlinks. However, if you see a lot of results, you should check the backlinks.

Let’s say you check two niches that have similar numbers. Let’s say, they have about 1000 in allintitle check. From this, you can conclude that you can easily rank in the top 1000. All you need to do is to mention your keyword phrase in your title. But who’s gonna find us in the 1000th position? We want to reach the top 10 ranking, or even the first position. Let’s say, in the first niche, we see the top 10 ranking sites have almost no links; in the next niche, however, we see that all sites ranking in the top 10 have a lot of quality backlinks. This shows us that, although these niches have almost the same numbers of people trying to rank for them, but the second niche has 10 people who know what they’re doing and are doing it right. In this case, we’ll have to think more about how to beat these 10 people instead of focusing on the total number of sites. Probably 99% of these 1000 sites don’t know what they’re doing – but these top 10 people do know, and they’ll make it difficult us to reach a rank in the top 10.

What Kind of Link Ranks Are There?

Another factor that many people don’t consider involves checking what kind of links show up when you type your desired keyword. What do I mean by that? We know very well that Google gives a huge priority to your site’s main page, which means that if you want to rank for any competitive keywords you should target them from your main page url, not from an internal pages on your site.
So, if you see internal pages, articles, blog posts, and so on as search results, you’ll know that this particular niche is not too competitive. If you see main sites urls, however, this means the niche is more competitive.

Let me give you one last tip: Keyword research is not easy, and it requires time and effort. There is a lot of trial and error necessary before you find the right keywords for your site or blog. Nevertheless, keep trying different niches and you will succeed.
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The Ultimate Guide for Keyword Research

Thứ Tư, 6 tháng 2, 2013

How to “unfriend” a Facebook friend without really unfriending them

Unfriend a Facebook friend without unfriending them 3 ways to unfriend a Facebook friend without really unfriending themGot an oversharing Facebook buddy who can’t stop with the food photos, a sullen friend who’s bringing you down with all his depressing updates, or a frenemy who you don’t want peeking at your Facebook photo albums?

Well, you could always hit the “unfriend” button, but doing so might seem a bit extreme—and hey, what if they find out?
Luckily, there are a few of ways to keep marginal Facebook pals at arm’s length without cutting them off altogether, starting with…

1. Add chatterboxes to your “Acquaintances” list

So, you added a long-lost friend you remember fondly from high school, but now they’re constantly peppering your news feed with random links about their favorite TV shows, silly cat photos, and endless snapshots of their kids.
It’s not that you want to slam the door on all their updates, mind you—just, well, most of them.
Facebook Acquaintances list 214x300 3 ways to unfriend a Facebook friend without really unfriending them
Want to see a little less of a friend in your news feed? Just add them to your Acquaintance list.
Here’s a quick, relatively painless solution: add your distant yet ever-chatty friend to your Acquaintances list.
Once you do, Facebook will automatically pare down the number of news feed updates you receive from them to a bare minimum.
For example, you might still get notified that a far-flung Facebook acquaintance got married or landed a new job, but you’ll get sweet relief from the daily kitty snapshots.
Indeed, putting an oversharing friend on your Acquaintance list makes for the perfect way to dial down their endless updates without silencing them altogether.
And don’t worry: your friend will never know that you relegated them to your Acquaintance list.
To add a friend to your Acquaintance list, just…
  • Hover your mouse over their name on their timeline or in your news feed.
  • When you see the pop-up window with their profile photo and a “Friends” button, hover your mouse over that button to reveal a new pop-up menu.
  • See the “Acquaintances” option? Go ahead and click it.
  • Want a little more control over which updates you’ll see from a specific friend? Instead of “Acquaintances,” click “Settings,” then start unchecking categories (from “Life Events” to “Comments and Likes”).
Oh, and one more thing: if you ever want to hide a post of your own from the folks on your Acquaintances list, you can choose the “Friends except Acquaintances” option from the audience selector (the pull-down menu that sits right next to the Post button).

2. Block downers from your news feed

Here’s another scenario: you have a pal who just won’t stop with the links to depressing news stories, the “I hate my job” updates, the bitter diatribes against the politician you voted for, and the off-color, not-so-funny jokes.

Facebook show in news feed setting 3 ways to unfriend a Facebook friend without really unfriending them
It’s easy to block all of a friend’s updates from appearing in your news feed.
Now, maybe you’re not quite ready to ban your bummer of a buddy from the updates and photos you share with fellow Facebook friends.
That said, here’s a pal whose name you’d rather not see in your news feed at all—not even if they got a promotion, had a kid, or managed to eke out a good day.
Well, guess what: you can completely block updates from that downer of a friend in just a few clicks:
  • Again, hover your mouse over the friend’s name on their timeline or in your news feed, then wait for the window with their profile photo to appear.
  • When it does, hover your mouse over the Friends button, click Settings, then uncheck “Show in News Feed.”
  • Last but not least, enjoy the silence.

3. Banish a frenemy to your Restricted list

Say you foolishly added your conniving boss as a Facebook friend your first week on the job … and now you’re regretting it. You’re thinking twice about every photo upload and every update you post, but “unfriending” your boss isn’t really an option. What to do?

Facebook Restricted list 3 ways to unfriend a Facebook friend without really unfriending them
Had enough of a certain Facebook frenemy? Banish them to your Restricted list.

Try this: put him on your “Restricted” list—a “friend list” for friends and frenemies who you’re this close to unfriending.
Once you banish someone to your Restricted list, their links, photos and updates won’t appear in your news feed at all (although you might see their name pop up in the ticker once in a blue moon).
Even better, they’ll no longer see any of your updates, photos, or other Facebook activity—or at least, nothing that you haven’t flagged as “Public” in your privacy settings.
In other words, putting a frenemy on your Restricted list is as close as you can get to unfriending someone without actually unfriending them.
Here’s how you do it:
  • Once more, hover your mouse over their name in your news feed or on their timeline, wait for the pop-up window to appear, then click the Friends button.
  • Select “Add to another list” from the menu, scroll all the way down, then click Restricted.
Note: While Facebook won’t notify a friend that you’ve put them on your Restricted list, an eagle-eyed frenemy may well notice that they’re not seeing your “friends only” updates anymore.

Tips

Want to see a list of all the friends whose posts are blocked from your news feed?
  • First, go to your news feed, hover your mouse over the News Feed link in the top-left corner of the page, click the little pencil icon, then click Edit Settings.
  • A pop-up window should appear, complete with the names of all the friends whose updates no longer appear in your news feed.
  • Change your mind on any of them? Click the little “X” next to their name.

This article was originally published in heresthethingblog.com
How to “unfriend” a Facebook friend without really unfriending them

Thứ Sáu, 1 tháng 2, 2013

Tips On Achieving SEO Success

If you are a regular Site-Reference reader, you most certainly have heard of the name “Rand Fishkin.”
Rand is the CEO of SEOMoz, a company that develops state-of-the-art tools and software, and hosts one of the most popular SEO blogs in the world.
Rand answered interview questions posed by Todd Malicoat of Stuntdubl.com. The interview included some pertinent information.

Q: Define SEO in 200 words or less.
A: ~82% of all the clicks on search results in engines like Google & Bing go to the unpaid, organic results.
Only ~18% go to paid listings. SEO is the practice of attracting traffic from those unpaid results and involves a massive array of strategies and tactics.

Q: If you had to identify the TOP 10 ranking factors, what would they be?
A:
  1. Relevance
  2. User Experience
  3. Popularity
  4. Quality
  5. Accessibility
  6. Branding/Ubiquity
  7. UI/Design
  8. Engagement
  9. Freshness
  10. Speed

Q: What are the most common SEO mistakes?
A: Nearly all of them revolve around two fundamentally flawed (and often diametrically opposed) core beliefs:
#1 – SEO is about optimizing toward a perfect formula vs. building a great brand and optimizing that brand’s signals to the engines
#2 – SEO will take care of itself if you get the product right

Q: Define quality, relevance, value, and authority.
A: Quality – a combination of potentially subjective and objective measures of the experience provided by a product or service
Relevance – the degree to which something meets a desired intent
Value – the combination of psychological, physical, financial, or other subjective/objective return(s) provided by a given product or service
Authority – the perceived importance and reliability of a source, often based on historical performance/accuracy, brand association(s), and social proof


Q: What is the future of SEO?
A: The practice will continue to exist, but it will be less and less a silo and more of a piece of the broader earned/inbound/organic marketing puzzle. User experience, search, social, content, links, and branding are all connected. The engines are constantly working to make their algorithms reward those who build genuine interest and value across these channels and devalue those who exploit any individual signal.


Q: When asked about what he thinks about SEO, Rand answered…
A: I think of SEO just like any other facet of marketing – it’s an ongoing, competitive process that requires consistent, diligent effort and solid measurement to determine what’s working vs. not. SEO is also an extremely fast moving and constantly evolving field (even if you’re doing only the most white hat, timeless techniques, there are new opportunities presented by the engines and the marketplace every week!).


Here is the interview in its entirety: Rand Fishkin Interview

original article is in site-reference.com 

Tips On Achieving SEO Success

Is Image Alt Text Relevant for Usability and SEO?

Images have a multitude of uses on a website. They can be used as navigational buttons, bullet points, text graphics and icons to name just a few. Most visitors to a website will be able to interpret and understand the images simply by looking at them. But there are many instances when users won’t be able to do this.

They include:
* Blind or partially sighted users who use screen readers when browsing.
* Users that have disabled the images in their browsers.
* Users that have text only browsers for various reasons.
* Search engine crawlers that can’t understand images.
Hyper Text Mark-up Language (HTML) allows you to add a textual description of the images so they can be read by browsers and understood in the situations listed above. This is done through the alt attribute. An example of this is:
<img src="www.mywebsite/images/my-dog.jpg" alt="This is my dog">

The image alt attribute is certainly a significant factor for usability and an important tool for search engine optimization (SEO). It provides website visitors with restricted access with an extra layer of functionality that enhances the usability of the site. It also allows search engine crawlers to understand what the images represent, which in turn helps them to rank in the search engine result pages (SERPs). For example, if a user did an image search for ‘big brown dog’ in a search engine, images with an alt attribute that contains the words ‘dog’ and ‘brown’ in various combinations have a chance of showing.
Below I have listed some aspects that can help your images regarding usability and SEO.

Image Tips
Use the following image formats when saving images for the web – gif, jpeg, png, bmp, svg and webp.
When saving an image use a filename that is descriptive of the image and not a generic filename, such as DSC221069.jpg.
Search engine crawlers normally index images of all sizes, but getting the file size down as small as possible will help with the page loading time and will enhance the visitor user experience. This can be done by reducing the physical size of the image and reducing the number of colors used by the image with the help of image manipulation software.
Specify the width and height of the image within the HTML. This tells a web browser the dimensions of the image before it has loaded and space will be reserved for it. This prevents the elements on a page from jumping around while it downloads. An example of this is:
<img src="www.mywebsite/images/my-dog.jpg" alt="This is my dog" width="450" height="200">
If you have text that is important in terms of relevancy to the website or SEO, do not embed it within an image, make sure it can be read as text and is part of the normal content on the page.

Alt Text Tips
Image alt text must be descriptive and ideally ten words or shorter. The following examples demonstrate correct, incorrect and average usage of the alt attribute:
Incorrect: <img src="http://www.mywebsite/images/my-dog.jpg" alt="">
Average: <img src="http://www.mywebsite/images/my-dog.jpg" alt="Dog">
Correct: <img src="http://www.mywebsite/images/my-dog.jpg" alt="This is my dog he is called Ringo">
For SEO purposes you should try to include keywords within the alt attribute, but avoid keyword stuffing. For example, if you were showing mens watches; this is an example of incorrect alt text usage:
<img src="http://www.mywebsite/images /menswatches.jpg" alt="mens watches, watches for men, watches men, men watches">
If your website has a number of images showing mens watches, make sure the alt text is different for each image. Try to include the model of the watch or the color.
If an image is used for navigational purposes, reflect this in the alt text. For example, an image used for a ‘Contact Us’ button should also have an alt attribute that reads ‘Contact Us’.
Where a company logo is displayed, it is good practice to use ‘Company Logo’ as the alt text. Some people make the mistake of typing ‘Back Home’ in the alt text tag for the company logo with a link that takes them to the main page. This should be avoided. It is always better to have descriptive alt text rather than the destination of the link.
Image HTML tags can also contain the title attribute and this is often confused with the alt text. The title attribute is meant to be read solely by a human visitor to the site, whereas the alt text is also read by search engine crawlers. An example of title text would be ‘Click here for more information’ on an image that links to another page.

When to Use Null Alt Text
Only use null alt text for images that are being used as spacers. These images are usually meant to be invisible and help structure the layout of certain elements. Null alt text is implemented like the following:
<img src="www.mywebsite/images/transparent.gif" alt="">
Use null alt text for icons, bullets and decorative images such as borders etc. Another way to stylise bullets and icons is through cascading style sheets (CSS) which will remove the need for the alt text completely.
By improving the usability of your website with the correct use of the image alt text attribute, you will enhance user experience which impacts on your site’s overall SEO in a positive way.

Article by Chris Talbot in SPN
http://www.sitepronews.com/2013/02/01/is-image-alt-text-relevant-for-usability-and-seo/
 Is Image Alt Text Relevant for Usability and SEO?

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