WCAG (the Web Content Accessibility Guidelines) is a set of recommendations made by WAI (which is itself part of W3C), in order to make web content more accessible. They define three levels of conformance: A, AA, and AAA (lowest to highest).
They are very important, so we made a dedicated WCAG page!
Resources:Learn more about WCAG
ARIA (the Accessible Rich Internet Applications suite) is a technical specification made by WAI (which is itself part of W3C), in order to make Rich Internet Applications more accessible. Rich Internet Applications include those with dynamic content, client-side rendering, and complex interactive UI components, such as drag-and-drop features. ARIA is also often called WAI-ARIA.
It’s very important, so we made a dedicated ARIA page!
Resources:Learn more about ARIA