Landmark
A labeled region of a page, such as the main content or the navigation, that assistive technology can jump to.
Landmarks are the big regions of a page: the header, the navigation, the main content, a search form, a sidebar, and the footer. HTML has elements for each (header, nav, main, aside, footer), and ARIA has matching roles for older code. People using a screen reader can list a page’s landmarks and jump straight to the one they want, the way a sighted person’s eye jumps to the main column.
A page needs one main landmark, and when there are two of the same kind, such as two navigation areas, each needs a label so they can be told apart. The W3C’s ARIA Authoring Practices Guide covers landmark roles and labels.
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