E-E-A-T is a framework from Google's Search Quality Rater Guidelines used by human evaluators to assess page quality. The four components are Experience (has the author actually done this?), Expertise (do they know the subject?), Authoritativeness (are they recognised in their field?), and Trust (is the site honest and safe?). It is not a direct ranking signal but shapes how Google's systems are trained and tuned. The extra "E" for Experience was added in December 2022.