Do all websites have to be ADA compliant? Does yours? Though the legal definitions are somewhat unclear, it is clear that inaccessibility invites legal action and misgivings from customers. Web accessibility does not have to be complex, and it may not take much to test your site and make it accessible. Take web accessibility step by step and you can avoid stressful lawsuits, and invite all patrons to your website.
Web designers often design in such a way that does not allow the user to adjust font size or color. While they may be protecting their brand, they are also inhibiting some users. Many visually impaired need to use high contrast color settings or very large fonts to read a website. Don't design your website in a way that makes it impossible for them to do this. 

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.