Is SEO still useful in 2026?

Yes. Google remains dominant, especially in France, and classic SEO drives most organic traffic. GEO adds to SEO, it doesn't replace it.

What's the difference between GEO and AEO?

GEO aims at being cited as a source in a generative answer. AEO aims at being extracted directly as the answer (featured snippet, voice), whether the underlying engine is generative or not.

Is llms.txt essential?

It can help orient some crawlers, but effective reading by the main models isn't guaranteed or universally standardized today. It complements a solid content strategy, it doesn't replace it.

How long does it take to be cited by a generative AI?

Citations are highly volatile: Profound shows 40-60% of cited domains change from one month to the next for the same query. A visibility gain must be consolidated over time.

Do backlinks still matter for GEO?

Yes, indirectly. A domain with strong link authority (measured by referring-domain count) statistically gets more AI-chatbot citations per multiple independent studies.

Do Perplexity and ChatGPT cite the same sources?

No. Perplexity favors forums and video, ChatGPT over-represents long articles and established authorities, Gemini leans on high institutional authority sites.

Does sponsored content work for GEO?

Barely. Muck Rack on 25M+ citations shows sponsored content is only ~0.3% of AI citations, versus 84% for earned editorial.

01Strategy

SEO vs GEO vs AEO in 2026: the complete guide to being found on Google AND cited by ChatGPT, Perplexity, Gemini and Claude

2026-07-08·12 min read

SEO optimizes for classic search engines (Google, Bing), GEO (Generative Engine Optimization) optimizes for being cited as a source by generative AI (ChatGPT, Perplexity, Gemini, Claude), and AEO (Answer Engine Optimization) targets direct answers — featured snippets, People Also Ask, AI summaries. Ranking first on Google no longer guarantees a ChatGPT citation: fewer than 10% of ChatGPT-cited sources appear in Google's top 10 for the same query per an Ahrefs study. The three disciplines overlap but require distinct optimizations.

What is SEO?

SEO (Search Engine Optimization) covers techniques that improve a site's ranking in classic search results — Google dominates, especially in France. The goal is the click: appear in the top 10 to capture qualified traffic. Historical levers (backlinks, keywords, page speed, UX) still matter but no longer guarantee visibility in new search formats.

What is GEO?

GEO (Generative Engine Optimization) covers techniques aimed at getting a site cited as a source by generative AI — ChatGPT, Gemini, Perplexity, Copilot, Claude. Unlike a classic engine that returns a list of links, these tools synthesize an answer from sources they select themselves. A site perfectly optimized for Google can be totally invisible in a ChatGPT answer — the two selection logics are largely independent.

What is AEO?

AEO (Answer Engine Optimization) targets direct-answer formats: Google featured snippets, People Also Ask, voice answers, and AI Overviews / AI Mode summaries. The point is to structure content — question as heading, short self-contained answer in the first lines — to be extracted verbatim, whether the engine is classical or generative.

SEO vs GEO vs AEO comparison

SEO targets Google/Bing with position and organic traffic as KPIs, driven by backlinks, keywords and Core Web Vitals, measured monthly. GEO targets ChatGPT/Perplexity/Gemini/Claude/Copilot with citation frequency and AI share of voice as KPIs, driven by schema.org, sourced factual content and freshness, measured weekly since citations are volatile. AEO targets featured snippets, AI Overviews and voice assistants with position-zero rate as KPI, driven by Q/A structure, 40-60 word answers and lists, measured continuously across SERP features.

12 signals that make an AI cite you

1) Domain authority: SE Ranking (129k domains, 216k pages) shows high-trust domains get ~4x more citations. 2) Traffic volume: sites >190k monthly visitors get ~2x more ChatGPT citations. 3) Referring domains: >32k referring domains = 3.5x higher citation odds. 4) Sourced numeric statistics. 5) Freshness: Ahrefs shows 79.1% of ChatGPT-cited listicles were updated within the year. 6) Structured format: Qwairy on 33k queries, 99% of answers use bullet lists. 7) schema.org markup (FAQPage, HowTo, Article). 8) Earned media: Muck Rack on 25M+ links, 84% of citations are earned editorial, 0.3% sponsored. 9) Community platforms: up to 17% of Perplexity citations (Wix Studio). 10) Content/engine alignment. 11) Unlinked mentions: Semrush on ~4k appearances, 61.7% are ghost citations. 12) Volatility: Profound observes 40-60% monthly rotation of cited domains, 70-90% over 6-12 months.

5-step method

1) Visibility audit: ask the same questions to ChatGPT, Perplexity, Gemini and Claude in logged-out sessions, log appearances, competitors, tone. 2) Technical structure: schema.org markup (Article, FAQPage, HowTo, Person) consistent across all surfaces. 3) AI-crawler orientation files: llms.txt and equivalents, noting effective reading isn't guaranteed. 4) Citable content production: sourced, numbered, updated, formatted as lists and short answers. 5) Continuous monitoring: volatility demands weekly checks, not one-off audits.

FAQ

Is SEO still useful in 2026?: Yes. Google remains dominant, especially in France, and classic SEO drives most organic traffic. GEO adds to SEO, it doesn't replace it.
Does ranking first on Google guarantee a ChatGPT citation?: No. Per an Ahrefs study, fewer than 10% of ChatGPT-cited sources appear in Google's top 10 for the same query — the two selection logics are largely independent.
What's the difference between GEO and AEO?: GEO aims at being cited as a source in a generative answer. AEO aims at being extracted directly as the answer (featured snippet, voice), whether the underlying engine is generative or not.
Is llms.txt essential?: It can help orient some crawlers, but effective reading by the main models isn't guaranteed or universally standardized today. It complements a solid content strategy, it doesn't replace it.
How long does it take to be cited by a generative AI?: Citations are highly volatile: Profound shows 40-60% of cited domains change from one month to the next for the same query. A visibility gain must be consolidated over time.
Do backlinks still matter for GEO?: Yes, indirectly. A domain with strong link authority (measured by referring-domain count) statistically gets more AI-chatbot citations per multiple independent studies.
Do Perplexity and ChatGPT cite the same sources?: No. Perplexity favors forums and video, ChatGPT over-represents long articles and established authorities, Gemini leans on high institutional authority sites.
Does sponsored content work for GEO?: Barely. Muck Rack on 25M+ citations shows sponsored content is only ~0.3% of AI citations, versus 84% for earned editorial.