ONPAGE · SEO GLOSSARY
Expertise Signals
Indicators in content and site structure that demonstrate first-hand knowledge, professional qualifications, or depth of experience on a topic — the "E" dimensions of Google\'s E-E-A-T quality evaluation framework.
Definition
Expertise signals are the content, structural, and metadata elements that demonstrate to search engines (and readers) that a page\'s author or creator has genuine knowledge and experience on the topic being covered. Within Google\'s E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) framework, expertise signals include: (1) **Author credentials and bio** — author bylines with professional qualifications, relevant professional experience, published works, or institutional affiliations establish expertise. A medical article written by an MD carries different expertise signals than one with no author attribution. (2) **First-hand experience indicators** — content that demonstrates the author has personally done, used, tested, or experienced what they\'re writing about ("I tested 15 structured data implementations and found...") signals the Experience dimension of E-E-A-T. (3) **Specific, verifiable claims** — content containing specific data points, case studies, exact measurements, and verifiable claims signals expert knowledge; vague generalisations suggest surface-level familiarity. (4) **Technical depth** — content that addresses edge cases, nuances, exceptions, and advanced considerations signals deeper expertise than introductory content that covers only the basics. (5) **Citing primary sources** — experts cite research, original data, and primary sources; non-experts cite other secondary sources. (6) **Author schema markup** — `Person` schema with `jobTitle`, `worksFor`, `sameAs` (linking to the author\'s professional profiles) declares expertise at the structured data level. (7) **Consistent authorship** — authors who publish repeatedly on the same topic area across a site build a topical expertise profile that Google can assess over time. Expertise signals matter more for YMYL (Your Money or Your Life) content categories — health, finance, legal, safety — where Google\'s quality guidelines require demonstrable expertise for high-quality ratings.
Why it matters for SEO
Expertise signals are a primary dimension of Google\'s quality assessments, particularly for YMYL content. Pages without demonstrable expertise — unsigned articles, thin content without specific knowledge, or content that could be written by anyone without domain knowledge — are rated lower quality by human quality raters and receive less algorithmic trust for authoritative query categories.
How DeepSEOAnalysis checks this
DeepSEOAnalysis audits structured data relevant to expertise signals: Person schema with professional properties (`jobTitle`, `affiliation`, `sameAs`), Article schema with `author` property linked to a Person entity, and Organisation schema that establishes the publishing institution. These structured signals supplement the textual expertise indicators that human readers and NLP systems assess.
GLOSSARY
Related terms
onpage
E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness)
Google\'s quality framework for evaluating content — especially important for YMYL (Your Money, Your Life) topics like health, finance, and legal.
Read definition →offpage
Authoritativeness
The degree to which a website or author is recognised as a credible, trusted source on a topic by other authoritative entities — including other websites, institutions, media outlets, and the broader web community — measured through citation, link patterns, and third-party recognition.
Read definition →technical
Trustworthiness
The degree to which a website is considered safe, honest, and reliable — including security (HTTPS), transparent ownership, accurate content, privacy practices, and clear contact information — the "T" in Google\'s E-E-A-T quality framework.
Read definition →authority
Author E-E-A-T
The Experience, Expertise, Authoritativeness, and Trustworthiness signals associated with a specific author or creator — distinct from site-level E-E-A-T — evaluated through author credentials, biography, byline clarity, published history, and structured data that explicitly attributes content to a named, verifiable person.
Read definition →See how your site scores on Expertise Signals.
The free DeepSEOAnalysis audit checks expertise signals and 100+ other signals. Full report, no signup.
Run a free audit →