content · content.h1Title.mismatch
H1 and title tag don't match
When the H1 and <title> share few words, Google may rewrite your SERP title — often worse than your own.
Why it matters
When H1 and title diverge, Google may rewrite your SERP title — sometimes badly. Consistent topical signals across <title>, H1, and URL slug strengthen rankings.
Authoritative reference
https://developers.google.com/search/docs/appearance/title-link
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