The “Main Landmark Check” evaluates whether the main landmark (which identifies the primary content of a webpage) is not nested within another landmark region.
Example outcome
I noticed that the main landmarks are not contained within other landmarks.
Impact
Visual Impairments: Screen readers may not identify the main content properly, making page navigation inefficient or misleading.
Motor Impairments: Keyboard-only users who rely on landmark navigation may not be able to quickly jump to the main content.
Cognitive Disabilities: Unclear structure makes it harder to understand where the primary content begins and ends.
Fixes
To address inappropriate main landmarks:
Locate the inappropriately placed main landmark.
Remove it from within the landmark in which it is nested.