Accessibility, or making online content available to fully or partially blind, deaf, or disabled people, is rapidly emerging as a critical component of successful UI/UX design. Changes in technology, work environment, culture, attitudes, and laws are driving that change. This lesson presents the kinds of users who need special features to access site content and how to test a site for accessibility. In addition, the lesson shows you how to research and address the legal requirements for accessibility, and proper techniques to ensure that a site is accessible.