Skip Links
Skip links are hidden navigation links, usually at the top of a page, that let keyboard users jump straight to the main content without tabbing through the menu, header and repeated layout elements first – one of the recognised techniques for WCAG criterion 2.4.1 (Bypass Blocks).
In practice
A skip link belongs directly after the opening body tag, so that it is the first focusable element on the page. It normally stays visually hidden but appears on keyboard focus (:focus), so that sighted keyboard users can see it. The target should be a sensible anchor such as #main on the main content itself. Whether the jump actually works is checked most reliably with a plain keyboard test using the Tab key. Skip links are not the only route, though: a clean heading structure or ARIA landmarks also satisfy the Bypass Blocks criterion.