What is GEO (Generative Engine Optimization)?

GEO (Generative Engine Optimization) is the art of optimizing a website so that it is cited, summarized and recommended by generative AIs like ChatGPT, Claude, Gemini, Perplexity or Google AI Overviews. Unlike classic SEO which targets a good ranking in the SERP, GEO aims to become a source the LLMs choose spontaneously when a user asks them a question.

Why is everyone talking about it in 2026?

In 2 years, the search landscape has shifted. In France, 58% of Google queries now trigger an AI Overview (SISTRIX study, April 2026). ChatGPT Search counts 600 million monthly active users according to OpenAI, and Perplexity exceeds 30 million. For many informational or commercial queries, the first touchpoint with a brand is no longer a blue link but a synthetic AI paragraph — which cites (or not) its sources.

The consequence is mechanical: if your site isn't structured to be read and cited by these engines, you lose visibility even when your classic SEO is impeccable.

The three GEO ruptures versus SEO

1. LLMs read raw HTML, without JavaScript

AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended) fetch your HTML but do not execute your JavaScript. A React, Vue or Angular SPA without server rendering appears as an empty shell: <div id="root"></div>. This is the #1 trap of GEO, and it massively penalizes poorly configured modern sites.

2. JSON-LD structured data makes the difference

In SEO, JSON-LD improves rich snippets. In GEO, it's a primary signal: LLMs use it to precisely identify what a page is (FAQ? product? local business?) and extract the information to cite. The most valued types are FAQPage, HowTo, LocalBusiness and Product.

3. "Answer-first" format trumps marketing copy

An LLM seeking to answer "How to do X?" will favor pages that open with a standalone answer of 15 to 80 words right after the H1. Long commercial intro texts dancing around the subject are systematically discarded in favor of more direct pages. Inverted pyramid mandatory.

Where to start?

Three concrete actions, in this order:

1. **Audit.** Run a free analysis with ScoreGeo and identify your 3 biggest projects.

2. **Fix invisibility.** If the "server rendering" criterion is red, it's absolute priority: switch to SSR/SSG before any other work.

3. **Stack structured signals.** Progressively add Organization, FAQPage on your question pages, HowTo on your tutorials, and a /llms.txt at the root.

Frequently asked questions