If you've been following our blog series on accessibility, you've likely seen mention of WCAG's different levels of conformance. In short, they are Levels A, AA, and AAA, each of which successively describing a higher standard of accessibility.

Each WCAG criterion we're discussing in this blog series has a conformance level designation. Often, these levels are cumulative, so a criterion designated Level AA may build on an earlier criterion labeled Level A, and a criterion designated Level AAA may, likewise, encompass rules covered in earlier Level A and Level AA criteria.