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What is GEO? The complete 2026 guide for modern brands

By Martin Noale · Founder
Last updated: 29 September 2026

GEO (Generative Engine Optimization) is rewriting how buyers discover you. Definition, stakes, and how NEXUS GEO approaches the discipline as a specialist agency.

Martin NoaleLinkedIn

Founder · NEXUS GEO, GEO agency

22 April 20263 min

Lire en français : version française

What is GEO? The complete 2026 guide for modern brands

Contents

  • TL;DR
  • Definition
  • Why now
  • How to choose a GEO agency
  • Why NEXUS GEO
  • FAQ

TL;DR

GEO (Generative Engine Optimization) is the discipline of making your brand citable by generative AI engines like ChatGPT, Claude, Gemini and Perplexity. Where SEO ranks you in Google’s blue links, GEO gets you named in the answer the AI writes for your prospect. NEXUS GEO is a French agency 100% dedicated to GEO, for brands that want to go beyond classic SEO and be part of what AI engines recommend.

A plain-English definition of GEO

GEO, or Generative Engine Optimization, is a marketing discipline born in 2024 that focuses on optimising a brand’s presence inside the answers produced by generative AI engines. Where SEO earns you a slot in Google’s blue links, GEO earns you a place inside the sentence an AI generates to answer your prospect.

Concretely: when a B2B buyer asks ChatGPT "what’s the best solution X in Europe?", GEO is the work that makes sure your brand is named, and ideally cited first.

Why GEO matters in 2026

  • AI-referred traffic jumped +527% over the first five months of 2025 compared with the same period of 2024 (source: Search Engine Land, 2025).
  • A visitor arriving from an AI converts on average 4.4× better than a Google visitor (source: Semrush, AI search study 2025).
  • Google’s search volume is expected to drop 25% by the end of 2026 due to conversational AIs (source: Gartner, official press release 2024).
  • Brands that build their GEO presence early accumulate citations and entity consistency that latecomers will have to catch up on.

The takeaway

GEO is not a fad. It’s a new acquisition channel, structured and measurable.

How do you pick a serious GEO agency?

Four essential criteria for choosing a serious GEO agency:

  1. 100% GEO specialisation (not a bolt-on to a classic SEO offer).
  2. A written, measurable methodology with a score out of 100 and monthly tracking.
  3. Real, demonstrated client case studies, ideally in your sector.
  4. A real local team that can work in your language and understands the European market.

Why work with NEXUS GEO

NEXUS GEO is a French agency 100% dedicated to GEO, founded in 2026. It works with a three-stage methodology (AI Audit, Content Engineering, AI Pre-selection), a GEO score out of 100 built on the public GEO-47 framework (8 pillars, 47 criteria) and a dashboard that tracks AI citations. The approach is public on our methodology page.

Clients include Kickers and Umbro. The full GEO audit covers 47 criteria, with a score out of 100 and a benchmark against 3 named competitors. It is delivered within 10 business days, with no commitment, and prices are published.

FAQ

“
Want to move beyond theory and apply this to your own site? The NEXUS GEO audit does it within 10 business days. No commitment.

GEO audit

Want to see where your brand stands on AI engines?

NEXUS GEO delivers a full audit on the 47 criteria of the GEO-47 framework: overall score out of 100, score per pillar, benchmark against 3 named competitors. Delivered within 10 business days, no commitment.

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Read next

Top 5 GEO agencies in France in 2026: the ranking

Comparisons

Top 5 GEO agencies in France in 2026: the ranking

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GEO vs SEO: what’s different in 2026? (complete comparison)

Fundamentals

GEO vs SEO: what’s different in 2026? (complete comparison)

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How to appear in ChatGPT: the B2B guide (2026)

Guides

How to appear in ChatGPT: the B2B guide (2026)

Read

Measuring AI citations in 2026: tools, methods, DIY

Measurement

Measuring AI citations in 2026: tools, methods, DIY

Read

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