Landmark roles (or “landmarks”) programmatically identify sections of a page. Landmarks help assistive technology (AT) users orient themselves to a page and help them navigate easily to various sections of a page.
They also provide an easy way for users of assistive technology to skip over blocks of content that are repeated on multiple pages and notify them of programmatic structure of a page.
Landmarks Bookmarklet for Accessibility Testing
Highlights all ARIA landmarks, including HTML5 tags that are interpreted as landmarks
Landmarks Bookmarklet Code
We hope these accessibility bookmarklets come in handy during your next accessibility audit.
Reference: Accessibility Bookmarklets