WCAG Levels A AA AAA
Read the Web Content Accessibility Guidelines, understand the four principles (POUR), and know which level of conformance is expected for most products.
Why Accessibility?
About 15% of the world has some form of disability. Accessible sites work for everyone: screen reader users, keyboard-only users, low-vision users, users on slow networks. Accessibility is also a legal requirement in many jurisdictions.
WCAG — Web Content Accessibility Guidelines
WCAG is the W3C standard that defines what makes web content accessible. Current version: WCAG 2.2 (October 2023). The successor WCAG 3 is in early draft.