72

E-E-A-T Periodic Table

72 quality signals for modern SEO · every cell links to the signal guide

E

Experience

Experience

1 Tm Lived testimonial 2 Ph Original photo 3 Vd Field video 4 Cs Case study 5 Ut User test 6 Jr Logbook 7 Av Before / After 8 Ds Screencast demo 9 Pp Product photo 10 An Anecdote 11 Ev Event 12 Iv Interview 13 Mt Personal method 14 Ph2 Process gallery

E

Expertise

Expertise

16 Dp Degree 17 Cf Certification 18 Pb Publication 19 Cf2 Speaker 20 Xp Years of XP 21 Sp Specialization 22 Mc Main content quality 23 Dn Proprietary data 24 Tx Technical lexicon 25 Sc Explanatory diagram 26 Bp Best practice 28 Co ComparisonGEO 29 Fa Expert FAQGEO 30 Pr Technical proof 31 Op Reasoned opinion 32 Vt Active monitoring

A

Authoritativeness

Authority

33 Bl Authority backlink 34 Mn Brand mention 35 Wk Wikipedia 36 Ea Verifiable author entity 37 Pf Pro profile 38 Pr2 Press 39 Pd Guest podcast 40 Aw Award 41 Pt Partnership 42 Cm Community 43 Sp2 Sponsoring 44 Au Guest author 45 Ds2 Cited dataset 46 Tk Brand track record 48 Ld Leadership 49 Cn Co-signature 50 Ce Advisory / Board

T

Trustworthiness

Trust

15 Bg Personal bio 27 Mq Update 47 Eq Online reputation 51 Hs HTTPS 52 Mt2 Legal notice 53 Pv Privacy policy 54 Ct2 Real contact 55 Ab Detailed About 56 Av2 Verified reviews 57 Tp Price transparency 58 Cy NAP consistency 59 Sg2 Signature 60 Sr Cited sources 61 Cr Correction 62 Cf3 Conflict of interest 63 Sc2 Security 64 Ex Factual accuracy 65 Px Page experience 66 Nm Needs Met 67 Sv Visible customer service 68 Ld2 Client logos

Cross-cutting concepts

69 Ym YMYL 70 Qr Quality Rater 71 Sg3 Search Generative 72 Bd Brand search

Anti-signals

Their presence hurts your rating, the 6 Lowest/Low patterns from the Quality Rater Guidelines (Sept. 2025).

Index of the 72 signals

Experience

Tm · Lived testimonial , A first-person account of direct experience with the subject (product, service, place).
Ph · Original photo , An image taken by the author, not from stock libraries.
Vd · Field video , A video demonstration recorded by the author in a real-world situation.
Cs · Case study , A detailed analysis of a real project or client with quantified results.
Ut · User test , A testing protocol run by the author, with observations and conclusions.
Jr · Logbook , A chronological record of prolonged use (e.g. 30 days with X).
Av · Before / After , A visual or quantified comparison of an initial and final state.
Ds · Screencast demo , A screen recording of the author performing a task.
Pp · Product photo , A photo of the product in hand, unboxing, personal usage context.
An · Anecdote , A short illustrative story drawn from the author's experience.
Ev · Event , A report on an event the author attended.
Iv · Interview , An original interview conducted by the author with a figure in the field.
Mt · Personal method , A framework or recipe developed and tested by the author.
Ph2 · Process gallery , A series of photos documenting the steps of a process.

Expertise

Dp · Degree , Mention of academic qualifications relevant to the topic.
Cf · Certification , A recognized professional certification (Google, AWS, professional body, etc.).
Pb · Publication , An academic article, book or professional publication by the author.
Cf2 · Speaker , A speaking appearance at an event in the field.
Xp · Years of XP , Explicit mention of the number of years practicing in the field.
Sp · Specialization , A clearly claimed niche or subfield of expertise.
Mc · Main content quality , Effort, originality, skill and depth demonstrated in the main content (MC).
Dn · Proprietary data , An original statistic, study or survey produced by the author.
Tx · Technical lexicon , Confident use of specialized vocabulary, defined where needed.
Sc · Explanatory diagram , An original diagram designed by the author to clarify a concept.
Bp · Best practice , Recommendations drawn from the field's consensus.
Co · Comparison , A rigorous comparison table between market options.
Fa · Expert FAQ , Frequently asked questions answered with technical precision.
Pr · Technical proof , A formal demonstration, calculation, code or benchmark.
Op · Reasoned opinion , A clearly owned and justified personal position.
Vt · Active monitoring , Reference to the latest developments and publications in the field.

Authoritativeness

Bl · Authority backlink , An inbound link from a recognized site in the field.
Mn · Brand mention , A citation of the site/author without a hyperlink.
Wk · Wikipedia , Presence as a source or subject on Wikipedia.
Ea · Verifiable author entity , Person schema + sameAs linking the author to all their verifiable public profiles.
Pf · Pro profile , LinkedIn, GitHub, ORCID profiles linked from the site.
Pr2 · Press , Editorial coverage in recognized media.
Pd · Guest podcast , Guest appearances on podcasts in the field.
Aw · Award , A recognized award or distinction in the field.
Pt · Partnership , An official collaboration with a recognized organization.
Cm · Community , An engaged audience (newsletter, Discord, forum) led by the author.
Sp2 · Sponsoring , Support of community events or content.
Au · Guest author , Articles published on other reference sites.
Ds2 · Cited dataset , A dataset produced by the author and reused by others.
Tk · Brand track record , Demonstrated history and lasting reputation of the brand in its field.
Ld · Leadership , A leading position or the founding of a movement, method, community.
Cn · Co-signature , Content co-signed with other recognized experts.
Ce · Advisory / Board , Member of an advisory or governing board.

Trustworthiness

Bg · Personal bio , A presentation of the author, background, reason for covering the topic.
Mq · Update , A dated revision of content to reflect the current state of the field.
Eq · Online reputation , Consistency and quality of Google results for the brand/author name.
Hs · HTTPS , A valid SSL certificate across the entire site.
Mt2 · Legal notice , A complete, accessible legal notice page.
Pv · Privacy policy , A GDPR-compliant privacy policy.
Ct2 · Real contact , Verifiable contact details: email, phone, postal address.
Ab · Detailed About , An 'About' page with mission, team, history, values.
Av2 · Verified reviews , Customer reviews via an independent third-party platform.
Tp · Price transparency , Public prices, clear terms, no hidden costs.
Cy · NAP consistency , Name-Address-Phone identical everywhere (site, GMB, directories).
Sg2 · Signature , Articles signed by an identified author, linked to a detailed profile.
Sr · Cited sources , Outbound links to primary, recognized sources.
Cr · Correction , A visible correction policy, dated errata.
Cf3 · Conflict of interest , Disclosure of affiliations, sponsorships, vested interests.
Sc2 · Security , A site free of malware, security alerts, fake content.
Ex · Factual accuracy , Verified facts, sourced figures and consistency with established expert consensus.
Px · Page experience , Main content accessible without obstacles: discreet ads, clean consent, clear navigation.
Nm · Needs Met , The page fully answers the real need behind the query (Needs Met).
Sv · Visible customer service , Identified responsible party and reachable customer service, especially on YMYL and transactional pages.
Ld2 · Client logos , Client or reference logos displayed, with permission obtained.

Cross-cutting concepts

Ym · YMYL , Your Money or Your Life: health, finance, safety topics held to a heightened E-E-A-T standard.
Qr · Quality Rater , Human evaluators who rate pages according to Google's official guidelines.
Sg3 · Search Generative , Appearing in generative summaries (AI Overviews, SGE).
Bd · Brand search , The volume of searches on the brand/author name.