E-E-A-T, Experience, Expertise, Authoritativeness, and Trustworthiness, started as guidance for Google’s human quality raters. It has since become just as relevant to how AI systems evaluate which sources to trust when generating an answer.
The useful way to think about each part:
Experience
Experience asks whether the content shows firsthand contact with the subject: a person who has actually run the process, used the product, or lived the situation being described. This is the hardest signal to fake and the one that dates fastest when a page is written by someone with no direct involvement. A guide to fixing a specific software error written by someone who has actually debugged it reads differently than one assembled from other articles, and both search engines and AI models are increasingly able to tell the difference.
Expertise
Expertise is about depth and accuracy on the specific topic, not a general credential. A detailed, correct explanation from a practitioner usually outperforms a broad overview from a generalist, even a well-credentialed one. This matters for smaller and specialized businesses: a niche expert with three years of hands-on experience in one specific area can out-rank and out-cite a large generalist publication that only skims the same topic.
Authoritativeness
Authoritativeness is largely external: do other credible sources reference this site or author on this topic. It is built slowly, through consistent, citable publishing and real mentions elsewhere, not through a single campaign. This is the E-E-A-T pillar most directly tied to link building and digital PR, since third-party mentions are the primary evidence a search engine or model has to evaluate authority from outside the site itself.
Trustworthiness
Trustworthiness covers the basics that are easy to overlook: accurate claims, clear sourcing, transparent authorship, and a site that is technically sound, secure, stable, not riddled with intrusive ads or misleading claims. A page can score well on the other three pillars and still lose trust if it makes an unsupported claim, hides who wrote it, or sits on a site riddled with broken links and popups.
A practical audit checklist
Does each page name a real author with relevant background? Does it cite where specific facts or numbers come from? Does it read like someone who has done the thing rather than summarized it? Would a skeptical expert reading it find anything to disagree with? Pages that fail two or more of these are usually the ones losing visibility first as AI-driven search matures, and they are usually the fastest to fix once the gap is identified, since the fix is often rewriting a byline and adding sourcing rather than a full content rebuild.
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