See also Sufficient and Advisory Techniques in Understanding WCAG 2.2 . All of these layers of guidance (principles, guidelines, success criteria, and sufficient
               and advisory techniques) work together to provide guidance on how to make content
               more accessible. Authors are encouraged to view and apply all layers that they are
               able to, including the advisory techniques, in order to best address the needs of
               the widest possible range of users. Note that even content that conforms at the highest level (AAA) will not be accessible
               to individuals with all types, degrees, or combinations of disability, particularly
               in the cognitive, language, and learning areas. Authors are encouraged to consider
               the full range of techniques, including the advisory techniques, Making Content Usable for People with Cognitive and Learning Disabilities , as well as to seek relevant advice about current best practice to ensure that Web
               content is accessible, as far as possible, to this community.