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What is an image alt tag?

An Image Alt Tag (also known as an “alt attribute” or “alt description”) provides an alternative description of a webpage image to any site visitor who cannot see it (for any reason).

Common causes for this:

  • The visitor is visually impaired and uses a screen reader.
  • The internet connection is slow and the image does not load.
  • The website cannot locate the image in its files.

Image Alt Tags can be created for each image on a webpage. (See example below)

When an image alt tag is placed on an image, the tag is displayed if the image fails to load or needs to be translated by a screen reader. (See example below)

Why is an Image Alt Tag important for SEO?

An image alt tag is important for several reasons.

First, image alt tags improve access to online information for users who are visually-impaired by converting on-screen content (text and images) to audio so they understand what content is on a webpage.

If an image has a correctly placed alt tag on it (or is “tagged”), a visually impaired person  can use a screen reader to identify what an image is on a page when its called out by the reader.

Using the image of a “website development process” again as an example (see image above), when a person using a screen reader scrolls over it the reader will call out that the picture is “a diagram showing the website development process”.

If an image does not have a correctly placed alt tag on it, a visually impaired person might hear this instead – picture is “image 34021.jpg”

Images not tagged offer no information or value to site visitors using readers about the image or its purpose for being on the page.

Second, image alt tags help search engine crawlers understand the content and context of a webpage.

When indexing a website, part of the job of a search engine crawler is to analyze tagged images to help determine the topics and subject matter of the particular webpages the images are located on.

A third reason is image alt tags offer the opportunity to rank in Google Image results.

Google Images accounts for over 20% of all online searches and is the world’s second largest search engine – bigger than Bing and YouTube combined.

Descriptive image alt tags increase the likelihood that an image will be found by Google to be relevant and included in certain SERPs.  

How does Organix Digital address Image Alt Tags?

Based on the package you choose, Organix Digital will evaluate the specific web pages you select on your website and update images with relevant descriptions that will help with SEO.

Wherever possible, we will incorporate core keywords based on our research and the keyword’s relevance to the image.

Premium packages allow our team to update alt tags on 20 unique pages on your site, and Advanced packages include updating alt text on 10 unique pages.

This strategy will also be incorporated on any new content (articles or blogs) produced by Organix Digital.

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