SEO Optimization images has become more and more essential in SEO (Seo optimization) for websites. The ALT attribute is a critical step that is often overlooked. This is often a lost opportunity for better rankings.
In Google's webmaster guidelines, they advise the use of alternative text for the images in your site:
Images:. Use the alt attribute to provide descriptive text. In addition, we recommend utilizing a human-readable caption and descriptive text round the image.
Why would they ask us to achieve that? The answer is easy, really; search engines like google have a similar problem as blind users. They cannot begin to see the images.
Many webmasters and inexperienced or unethical SEOs abuse the use of this attribute, attempting to stuff it with keywords, looking to achieve a particular keyword density, which is not as relevant for rankings now since it was previously.
On the contrary, high keyword density can, on some search engines like google, trigger spam filters, which may create a penalty for your site's ranking. Even without this type of penalty, your site's rankings will not take advantage of this tactic.
This process also puts persons who use screen readers at a greater disadvantage. Screen readers are software-based tools that actually read aloud the contents of what's displayed on the screen. In browsing the web, the alt features of images are read aloud too.
Imagine listening to a paragraph of text that is followed by repetitions of numerous keywords. The page will be not even close to accessible, and, to put it bluntly, will be found quite annoying.
What is an Alt attribute?
An ALT attribute should not be used as a description or perhaps a label to have an image, though lots of people utilize it for the reason that fashion. Although it may appear natural to assume that alternate text is a label or a description, it's not!
The words used within an image's alt attribute ought to be its text equivalent and convey the same information or serve exactly the same purpose the image would.
The thing would be to supply the same functional information that the visual user would see. The alt attribute text should be the "stand in" in the event that the image is not available. Ask yourself this: If you were to replace the image using the text, would most users receive the same basic information, and would it generate the same response?
Some examples:
Some SEO Optimization Tips
If a search button is a magnifying glass or binoculars its alt text should be 'search' or 'find' not 'magnifying glass' or 'binoculars'.
If the image is supposed to convey the literal items in the image, then a description is suitable.
If it is meant to convey data, then that data is what's appropriate.
If it's meant to convey using a function, then the function itself is what should be used.
Some Alt Attribute Guidelines:
Always add alt attributes to images. Alt is mandatory for accessibility as well as for valid XHTML.
For images that play only a decorative role within the page, make use of an empty alt (i.e. alt="") or perhaps a CSS background image to ensure that reading browsers do not bother users by uttering such things as "spacer image".
Keep in mind that it is the function from the image we are trying to convey. For instance; any button images shouldn't include the word "button" within the alt text. They should emphasize the action performed by the button.
Alt text ought to be based on context. The same image inside a different context may require drastically different alt text.
Try to flow alt text with the rest from the text because that's how it will be read with adaptive technologies like screen readers. Someone listening to your page should hardly be aware that a graphic image is there.
Please remember that using an alt attribute for every image is required to meet the minimum WAI requirements, that are used as the benchmark for accessibility laws in UK and also the rest of Europe. They are also necessary to meet "Section 508" accessibility requirements in the US.
It is useful to categorize non-text content into three levels:
Eye-Candy
Mood-Setting
Content and Function
I. Eye-Candy
Eye-Candy are stuff that serve no purpose other than to create a site visually appealing/attractive and (in many cases) satisfy the marketing departments. There is no content value (though there may be value to some sighted user).
Never alt-ify eye-candy unless there's something there which will boost the usability of the site for somebody using a non-visual user agent. Use a null alt attribute or background images in CSS for eye-candy.
II. Mood-Setting
This is actually the middle layer of graphics which may actually set the atmosphere or set happens so to speak. These graphics aren't direct content and could not be considered essential, but they're essential in that they help frame what is going on.
Attempt to alt-ify the second group as is sensible and is relevant. There may be times when doing this might be annoying or detrimental with other users. Then try to avoid it.
For example; Alt text that's just like adjacent text is unnecessary, and an irritant to screen reader users. I recommend alt="" or background CSS images in such cases. But sometimes, it's important to get this content inside for those users.
Most times it depends on context. Exactly the same image in a different context may need drastically different alt text. Obviously, content ought to always be fully available. The way you use this case is a judgment call.
III. Content and Function
This is when the look is the actual content. Always alt-ify content and functional images. Title and long description attributes may also be in order.
The main reason many authors can't figure out why their alt text isn't working is they don't know why the pictures are there. You have to figured out exactly what function a picture serves. Think about what it is concerning the image that's vital that you the page's intended audience.
Every graphic has a reason for being on that page: since it either enhances the theme/ mood/ atmosphere or it is critical to what the page is trying to describe. Understanding what the look is for makes alt text simpler to write. And practice writing them definitely helps.
A method to check the usefulness of alternative text would be to imagine reading the page on the phone to someone. An amount you say when encountering a specific image to make the page understandable to the listener?
Besides the alt attribute you've got a couple more tools at your disposal for images.
First, in level of descriptiveness title is in between alt and longdesc. It adds useful information and can add flavor. The title attribute is optionally rendered through the user agent. Remember they're invisible and not shown like a "tooltip" when focus is received through the keyboard. (A lot for device independence). So make use of the title attribute only for advisory information.
Second, the longdesc attribute points to the URL of a full description of an image. When the information contained in an image is important to the concept of the page (i.e. some important content would be lost if the image was removed), a longer description than the "alt" attribute can reasonably display ought to be used. It may offer rich, expressive documentation of a visual image.
It ought to be used when alt and title are insufficient to embody the visual qualities of an image. As Clark [1] states, "A longdesc is a long description of the image...The aim is by using any period of description essential to impart the details from the graphic.
It wouldn't be remiss to hope that the long description conjures an image - the image - in the mind's eye, an analogy that is true even for the totally blind."
Even though alt attribute is mandatory for web accessibility and for valid (X)HTML, not every images need alternative text, long descriptions, or titles.
In many cases, you're best just choosing your gut instinct -- if it's not essential to incorporate it, and when you don't possess a strong urge to do it, don't include that longdesc.
However, if it's essential for the whole page to operate, then you have to add the alt text (or title or longdesc).
What's necessary and what's not depends a lot about the function of the image and it is context on the page.
Exactly the same image may need alt text (or title or longdesc) in one spot, but not in another. If the image provides absolutely no content or functional information alt="" or background CSS images might be appropriate to use. But if the image provides content or adds functional information an alt would be required and perhaps a long description will be so as. In many cases this kind of thing is really a judgement call.
Image Seo optimization Tips
Listed here are key steps in optimizing images:
Choose a logical file name that reinforces the keywords. You can use hyphens within the file name to isolate the keyword, but avoid to exceeding two hyphens. Stay away from underscores like a word separator, like for example "brilliant-diamonds.jpg";
Label the file extension. For instance, if the image search engine sees a ".jpg" (JPEG) file extension, it's likely to assume that the file is really a photo, and when it sees a ".gif" (GIF) file extension, it's likely to assume that it is a graphic;
Make sure that the written text nearby the image that is relevant to that image.
Again, don't lose a great opportunity to help your website together with your images searching engines. Begin using these steps to rank better on all the engines and drive increased traffic to your site TODAY.
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