Heading levels that skip
WarningLow priority
Parsed pages whose headings jump more than one level deeper, such as an H2 followed by an H4.
Why it matters
A screen reader moving through the page by heading meets a gap in the outline, as though a section had been left out.
How to fix it
Use the next level down for a subsection, and style it however it should look. Going back up — an H3 then an H2 — is fine.
Skitter runs this check on every crawl, and lists each page it finds with the evidence: the header, the tag or the link that gave it away.