Use ARIA role attributes on tags to help the 285 million blind and visually impaired people in the world that could be a potential user.
To put that in perspective, the population of the United States is estimated at around 315 million people.
- application - region declared as a web application
- banner – region that contains mostly site-oriented content, rather than
- complementary - supporting section of the document, designed to be complementary to the main content at a similar level in the DOM hierarchy, but remains meaningful when separated from the main content
- contentinfo – contains information about the parent document such as copyrights and links to privacy statements
- form - region that contains a collection of items and objects that, as a whole, combine to create a form
- main –main content of a document
- navigation – collection of navigational elements (usually links) for navigating the document or related documents
- search – region that contains a collection of items and objects that, as a whole, combine to create a search facility