It’s well-known that the Americans With Disabilities Act (ADA) requires brick-and-mortar businesses be accessible to all patrons. This includes considerations like wheelchair accessibility and Braille or large print for blind and low-vision patrons, among other things. The ADA references “public accommodations,” and outlines 12 categories that essentially covers all types of public-facing businesses. However, the legislation does not address public-facing websites.
The words in the tag should be more than a description. They should provide a text equivalent of the image. In other words, the tag should include the same meaningful information that other users obtain by looking at the image. In the example of the mayor’s picture, adding an “alt” tag with the words “Photograph of Mayor Jane Smith” provides a meaningful description.