Providing Useful Alternative Text for Images

For screen reader users and SEO, it is important to put in alternative text for images that convey the meaning that the visual represents. In most cases this is fairly straight forward, but it is a very common source of web accessibility problems in Drupal sites.

There are a number of great resources on when and how to provide alt text for images:

• http://www.webaim.org/techniques/alttext/
• https://en.wikipedia.org/wiki/Wikipedia:Alternative_text_for_images
• http://www.w3.org/TR/html-alt-techniques/
• http://w3c.github.io/alt-techniques/
• http://www.4syllables.com.au/2010/12/text-alternatives-decision-tree/

Note: Many of these resources are focused towards static HTML pages which contain issues that you may never encounter as a content author within a modern CMS like Drupal.