A mechanism is available to bypass blocks of content that are repeated on multiple Web pages.
Provide a mechanism to bypass repetitive blocks of content.
Improves navigation efficiency for users relying on assistive technologies.
Not having the "Skip to main content" link present at all. Sometimes it might be present, but it might try to jump to an ID that doesn't exist on the page.
Not realising this type of approach can, and also should be used with other types of content that repeats on several pages.
Check if the first focusable element on the page is a "skip to main content" type of link. These should jump over the repeating header element on a page.