E-E-A-T
Experience, Expertise, Authoritativeness and Trustworthiness: the qualities Google's quality rater guidelines ask raters to assess.
E-E-A-T comes from Google's Search Quality Rater Guidelines, the handbook for the people who evaluate search results to help Google test changes. Experience was added to the original E-A-T in December 2022.
It is not a single ranking factor or score. Raters' judgements do not change rankings directly; they tell Google whether its systems are surfacing content with these qualities, especially for topics that affect health, money or safety.
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