CP137: OnPageCanonicalUrlMatches

Number of matches in canonical URL

Correlates the number of matches in the canonical URL as a factor.

This factor correlates the number of keyword matches in the canonical URL (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://support.google.com/webmasters/answer/139066?hl=en.