When you're considering how the Americans with Disabilities Act (ADA) relates to your website, you'll want to have a general understanding of Web Content Accessibility Guidelines (WCAG).
The Web Content Accessibility Guidelines are the internationally recognized standard for web content created by the World Wide Web Consortium (W3C). They were developed to make web content more accessible to a wider range of people with disabilities including blindness and low vision, limited movement, speech disabilities, photosensitivity and a combination of these.
Following these guidelines are the best means of creating a great user experience for all of your users.
The WCAG are organized into three levels:
Understanding that there are levels will help you determine your goals for making your website more accessible. Even if you can't or won't attain Level AAA, it is still worth the effort to start with Level A and make progress toward helping your users.
Here are several Level A things you can do to increase the accessibility of your website for visitors with disabilities. As a bonus, they will help to make your website more useful to all of your users and help with your SEO too.