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Key takeaways:
In summary, E-E-A-T has become a cornerstone of visibility in SEO and GEO. The more a piece of content demonstrates its expertise, experience and trustworthiness, the more likely it is to be highlighted by search engines and AI assistants.
The search ecosystem has changed radically. With the advent of answer engines and GEO (Generative Engine Optimisation), simple semantic and technical optimisation is no longer enough. To perform well on Google AI Overviews, Perplexity, Gemini or ChatGPT, one concept has emerged as the ultimate filter for credibility: E-E-A-T.
What is E-E-A-T? Why has it become the focal point of traditional SEO and optimisation for generative search engines? We offer an in-depth analysis to help you adapt your content strategy to the requirements of 2026.
E-E-A-T is a concept derived from Google’s Search Quality Raters Guidelines (the guidelines for human evaluators of search result quality). It is not a direct algorithmic ranking factor (such as page speed), but rather a set of signals that enable algorithms to measure a website’s value and reliability.
Introduced at the end of 2022, this first ‘E’ assesses whether the content author has practical, first-hand experience of the subject.
Expertise refers to the author’s theoretical knowledge, qualifications or professional standing.
Authority measures the reputation of a website and its author within their field. It is reflected in peer recognition, citations, shares and links from other authoritative websites (backlinks).
This is the cornerstone of the whole structure. Trust encompasses the website’s transparency, security and honesty (clear legal notices, accessible customer service, verified customer reviews, HTTPS security protocols). If a website is not deemed trustworthy, the other three pillars collapse.
In SEO, E-E-A-T acts as a shield against Google’s Core Updates. The search engine actively seeks to eliminate ‘noise’ from the web – namely, the millions of pages mass-generated by AI without any human input.
E-E-A-T is all the more vital for so-called YMYL (Your Money or Your Life) websites. These topics (finance, health, law, e-commerce) directly affect users’ well-being, financial security or health. For these queries, Google applies stringent evaluation criteria. A lack of E-E-A-T signals immediately results in a significant loss of visibility, with institutional sources or recognised experts taking precedence.
GEO is the discipline of optimising a website so that it is cited and recommended by search engines based on artificial intelligence (LLM). Unlike traditional SEO, which displays blue links, GEO aims to integrate ‘sources’ and ‘citations’ into the responses generated by AI.
Large language models suffer from a major flaw: hallucinations. To ensure that their responses are accurate and do not put the user at risk, engines such as Google AI Overviews and Perplexity rely on a process known as RAG (Retrieval-Augmented Generation). The AI retrieves information in real time from the web to inform its response.
To select these sources, the AI uses E-E-A-T as a safety filter:
| E-E-A-T criteria | Role in Traditional SEO (Google) | Role in GEO (AI Engines / LLMs) |
| Experience | Incorporating user reviews and real-world tests into search results (snippets). | Incorporating verbatim quotes and unique feedback into AI summaries. |
| Expertise | Analysis of deep semantic structures (semantic cocoons) and authors’ biographies. | Selection of sources that present clear data structures and verifiable facts (fact-checking). |
| Authority | A strong focus on the backlink profile (PageRank) and the domain’s reputation. | Focus on brand mentions (even without links) and presence in knowledge bases. |
| Trust | Technical criteria (HTTPS, terms and conditions, contact pages) and no spamming practices. | The top priority is to avoid hallucinations; immediately discard contradictory or dubious sources. |
To maximise your chances of appearing at the top of the rankings on traditional and generative search engines, here is our experts’ roadmap:
No. There is no secret ‘E-E-A-T score’ that can be measured in Google Search Console. It is an overarching concept measured by a multitude of algorithmic micro-signals (links, semantics, user behaviour, technical clarity).
Not inherently. Google has clarified its position: the way content is produced is irrelevant, as long as it is useful and of high quality. However, as generic AI has neither ‘Experience’ nor ‘Expertise’ of its own, a 100 per cent automated text without human proofreading or enrichment will almost always fail to meet the E-E-A-T criteria.
To assess your GEO performance, you need to analyse your share of voice in the generated responses (such as Google AI Overviews or Perplexity). If your site is regularly cited as a reference source in AI-generated text blocks, your E-E-A-T level is deemed excellent.
SEO and GEO are not at odds with one another: they converge towards a shared commitment to quality and authenticity.
Key takeaways: E-E-A-T has become a major trust signal 👉 Experience, Expertise, Authority and Trust enable Google and AI-powered search engines to identify the most reliable content, even if it isn’t a direct ranking factor. An essential lever for traditional SEO 👉 E-E-A-T helps content withstand Core Updates and stand out from generic content, particularly […]
