Web Content Accessibility Guidelines (WCAG)
Web Content Accessibility Guidelines, better known as WCAG, are a series of web accessibility guidelines that were published by the Web Accessibility initiative (WAI) of the World Wide Web Consortium (W3C). The guidelines serve as recommendations for making web content more accessible to individuals with disabilities.
Perceivable
Content must be presented understandably regardless of user ability status.
Operable
Website navigation and interfaces must be usable by all users.
Understandable
Content, information, and website functionality should be clear to all users.
Robust
Websites should function across various devices and assistive technologies as technology evolves.
Level A
Foundational accessibility level; doesn't heavily impact design but is essential to prevent serious accessibility problems.
Level AA
Represents accessibility for most users; websites achieving this also meet Level A requirements.
Level AAA
Optimal accessibility status; requires passing all WCAG guidelines including previous levels, though rarely achieved.