Correlates the number of matches in the web page H1-H6 tags as a factor.
This factor correlates the number of keyword matches in H1,H2,H3,H4,H5, and H6 tags (in the HTML source) with rankings.
The matches counted include any of the relevant hits highlighted by Google in the search results.
You can learn more about the targeted zone for this factor at: https://www.w3schools.com/tags/tag_hn.asp.
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