What does this mean?

Headings in a PDF should follow the sequence Heading 1 -> Heading 2 -> Heading 3 without skipping intermediate headings.

It is acceptable to 'go back' to previous styles/headings but the sequence should then continue without missing headings.


90.9% done

How close this website is to fixing this issue.

35 distinct issues were found in the sample of 125 web pages.
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