What are Image Alt Tags and How Do They Affect Your SEO?

What is a picture alt tag?

An “alt attribute” (or “alt description”) is usually mentioned as simply an “alt tag”. An alt tag is an HTML attribute that's applied to image tags, providing search engines with a text alternative for interpreting a picture.
The main purpose of alt tags is to enhance the user experience for the visually impaired. Alt tags are a part of the online since 1995, with the discharge of HTML 2.0, but are often inadequately implemented or unsupportive of visually impaired web users.
Alt text allows screen-reading tools employed by the visually impaired to explain your images. The alt tag is ‘read’ by screen readers employed by both blind and visually impaired people to explain the image for them.
Alt tags are a basic information device that ought to be used once you aim to make an accessible website. apart from making your website accessible to all or any, once you get your alt tags right you'll be ensuring your website’s SEO is simpler. Alt tags help search engines provide the foremost relevant results when a user searches for images. Applying images that appear on your website to alt tags can, therefore, have a positive effect on your program rankings

What role do alt tags play in SEO?

An optimized website is probably going to seem higher in Google searches, and while Google uses many various factors when deciding where your website will rank, alt tags certainly play a crucial part in image search results.
Google extracts information from alt text and uses this, along with side computer vision algorithms and page content, to interpret the topic of the image. Googlebot and other program crawlers cannot interpret images, unlike people that can discern considerable information from images. Often on e-commerce sites product photos can support sales the maximum amount as, if less than, the accompanying text does. Therefore, having product images appear, and rank highly, in Google search results can increase organic traffic – and alt tags are the key.
Search engines and other robots require alt tags to supply text deciphering each image for them. Alt tags allow them to ‘read’ the knowledge found within the pictures. Images with correctly formatted alt text enable program crawlers to use the knowledge provided to contribute to the inspected web pages’ rankings and the way the page is indexed.

Where is an alt tag located?

Alt text can be found within the image tag, for example:
<img src="“seo.png”alt=“apple_iwatch_black_nike”/" />
The alt text describes the image and often – when using an image as a button – it will describe the function of the image on the page, for example:
<img src="“seo.png”alt=“button_to_buy_apple_iwatch_black_nike”/" />

Tips on writing image alt text 

Your aim when writing an alt tag should be to supply enough information in order that people that are unable to ascertain the image can easily understand what the image represents, and why it appears on the online page.
You should avoid writing your alt tags just for SEO and search engines. Your aim should be to speak the functional information that the image conveys when viewed.

Best Practices 

• Keep your text brief. Shorter alt texts are easier for Google and other search engines to efficiently index, and will always mention the subject. 
• Usually, product images are optimized with identical keyword/s to the merchandise page it relates to. 
• Resist keyword stuffing – Google, and other search engines, don't think of this favorably and it'll likely work against you. 
• Alt tags should only be prioritized for image-laden pages and text light. Never prioritize alt tags over important SEO factors like inter-linking, titles, and/or meta-descriptions. 
• When writing alt text, be unambiguous and descriptive. Consider the image and therefore the context of the image while being as specific as possible. Sometimes describing what's within the image isn't an equivalent because the intent of the image: for instance, a ferocious-looking lioness together with her young might be described as “angry lioness and cubs”. However, if the image was getting used to convey a picture of a mother who would do anything to guard her offspring, then a special description, like “protective mother lioness guarding her cubs” would better convey the image’s intent. 
• Conduct an internet site audit of your images, including those found in any blog posts. attempt to incorporate alt text into as many images as you'll and monitor traffic to notice any changes in organic traffic rates to the pages with new alt tags. 
• Do not use a “picture of” or “image of” or “photo of” in your alt text. you've got around 125 characters available to you before program crawlers will stop ‘reading’ your alt text. Besides, the robots already recognize alt text as image description, so avoid wasting those precious characters! 
• You should apply alt text to your form buttons, like ‘submit’, ‘sign up’ and ‘send’, however, consider your visually-impaired visitors who ‘listen’ to your website being read to them by an on-screen reading tool and refrain from labeling every item on your pages, like decorative items, borders, bullets, decorative backgrounds, and other unnecessary icons. 
• Including several relevant images together with your blogs and articles will encourage people to read them and - once you nail the alt tags - you'll be improving your ranking in image search results, too. 
• Alt-text is often helpful as anchor text when using a picture as a link.

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