CP139: OnPageClassAttributeMatches

Number of matches in web page class attributes

Correlates the number of matches in the web page class attributes as a factor.

This factor correlates the number of keyword matches in class attributes (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/att_class.asp.