ADA stands for the Americans with Disabilities Act, a civil rights law that prohibits discrimination against individuals with disabilities in all areas of public life, including jobs, schools, transportation, and all places open to the general public.

WCAG stands for Web Content Accessibility Guidelines, a set of guidelines developed by the World Wide Web Consortium (W3C) that provides recommendations for making web content more accessible to people with disabilities, including those who are blind or visually impaired, deaf or hard of hearing, or have mobility or cognitive disabilities.

ADA compliance involves making sure that all aspects of a public place, including its websites and digital content, are accessible to individuals with disabilities. WCAG compliance specifically refers to making sure that web content conforms to the guidelines set forth by the W3C in order to make it accessible to people with disabilities.

In practical terms, this means designing websites and digital content with features such as alternative text for images, captions for videos, clear and simple language, and keyboard navigation options, among others, to ensure that people with disabilities can access and use the content in the same way as people without disabilities.