WCAG
/ˈwɪkæɡ/
WCAG (Web Content Accessibility Guidelines) is a set of recommendations from the W3C that defines how to make websites and apps accessible to people with disabilities. It is built on four principles: content must be perceivable, operable, understandable, and robust.
Its success criteria are graded across three conformance levels, A, AA, and AAA, so teams can measure how accessible a product is and set a clear target to reach.
Why does WCAG matter?
Meeting WCAG, usually level AA, is both good practice and, in many countries, a legal requirement. Sufficient colour contrast, keyboard navigation, alt text, and clear structure make a product usable for everyone.
Following the guidelines also improves the experience for all users and helps with SEO and maintainability, since accessible markup tends to be cleaner, more semantic, and easier for machines to understand.
