Abstract. This document, "Understanding WCAG 2.0," is an essential guide to understanding and using Web Content Accessibility Guidelines (WCAG) 2.0.It is part of a series of documents that support WCAG 2.0.

Understanding Conformance. All WCAG 2.0 Success Criteria are written as testable criteria for objectively determining if content satisfies them.

Using the WCAG 2.0 design principles and guidelines to build accessible services.