Why it matters
Without a skip link or landmarks, keyboard users must tab through the entire header and navigation on every page before they reach the content.
How to fix it
Add a "Skip to content" link as the first focusable element that targets <main id="content">, and use semantic landmarks.
Example
<a class="skip-link" href="#content">Skip to content</a>References
More accessibility rules
void a11y reports 48 rules in this category. WCAG 2.2 AA through axe-core, plus checks axe can't do alone: visible keyboard focus, 24/44px target size on mobile, 320px reflow and disabled zoom.
scrollable-region-focusableScrollable region is not keyboard accessiblelink-in-text-blockLinks in text are distinguished only by colorautocomplete-validInvalid autocomplete valuemeta-viewportZooming is disabledvideo-captionVideo has no captionsaxe-otherOther axe-core accessibility violationtarget-sizeTouch target is smaller than 24×24 pxfocus-not-visibleKeyboard focus is not visible