What is GEO? How to show up on ChatGPT & Google AI Overviews
More and more people ask ChatGPT, Perplexity or Google AI Overviews directly instead of scanning ten search results. At that point the question is no longer "how do we rank on Google" but "does AI mention your brand at all". That is exactly what GEO is about.
GEO (Generative Engine Optimization) is optimizing content so AI tools such as ChatGPT, Perplexity and Google AI Overviews cite it in their answers. Where SEO targets clicks, GEO targets being named by AI. Princeton research shows that statistics, source citations and direct quotations are the three strongest factors for getting cited by AI.
What is GEO?
GEO stands for Generative Engine Optimization. It is the process of optimizing content so that AI tools such as ChatGPT, Perplexity, Google AI Overviews and Microsoft Copilot cite it in their answers. The term was formally introduced in 2023 by a research group led by Princeton University and presented at KDD 2024[1].
In other words: if SEO gets you to the top of a list of links, GEO makes you the source AI relies on to answer.
How is GEO different from SEO?
| Criteria | Traditional SEO | GEO |
|---|---|---|
| Goal | Rank high, attract clicks | Get cited inside AI answers |
| Channel | Classic Google Search | ChatGPT, Perplexity, AI Overviews, Copilot |
| Key signals | Backlinks, keywords, speed | Statistics, source citations, authority, schema |
| Outcome | Clicks to your website | Brand mentions and source attributions |
| Measurement | Rankings, traffic | How often you appear in AI answers |
Important: GEO complements SEO, it doesn't replace it. SEO's technical foundation and quality content remain a prerequisite.
What does AI base its citations on?
This is where most people guess - but there is quantitative evidence. The Princeton team tested six content adjustments across ten generative search engines and ten thousand queries[1].
Princeton's key finding: adding statistics, citing authoritative sources and including direct quotations are the three most effective tactics, boosting the likelihood of being cited by AI by up to roughly 40% compared to plain content.
Beyond those three, signals that typically earn AI's trust include: answering the question directly at the top of each section, credible authorship (E-E-A-T), structured data, and freshly updated content.
How to optimize your website for GEO
- Answer the question directly at the start of each section, in a short passage AI can quote verbatim.
- Add statistics and cite authoritative sources - exactly as the Princeton research recommends.
- Strengthen E-E-A-T: real authors, clear expertise, transparent information.
- Structured data: Article, FAQ and Organization schema so AI understands the context.
- Add an llms.txt file so AI crawlers correctly understand your brand and key content.
- Build consistent brand mentions across multiple places so AI recognizes your brand as an entity.
The article you're reading applies these very GEO principles: it has statistics, academic citations, clear authorship and structured data. That's how Chạm AI does GEO for clients.
GEO for your business
Users are rapidly shifting to asking AI directly - in every language. The businesses that get cited by AI early gain a visibility advantage that is hard to copy, especially in high-consideration industries such as real estate, healthcare and premium retail, where buyers research thoroughly before spending. At Chạm AI, GEO is part of our next-generation SEO/GEO service, working alongside AI Agents and a phygital strategy so your brand shows up seamlessly in both classic search and AI answers. See our services.
Frequently asked questions about GEO
Does GEO replace SEO?
No. GEO complements SEO. SEO's technical foundation and quality content are still required; GEO adds a layer of optimization so content is understood and cited by AI.
How long until GEO shows results?
It depends on how often AI systems re-crawl and update. Typically a few weeks to a few months - faster if the content already has a solid SEO foundation.
How do you measure GEO?
Track how often your brand appears and is sourced in answers from ChatGPT, Perplexity and AI Overviews, plus referral traffic from AI platforms.
References
- Aggarwal et al., Princeton University - GEO: Generative Engine Optimization (KDD 2024, arXiv:2311.09735).
- The Digital Bloom - 2025 Organic Traffic Crisis: Zero-Click & AI Impact Report (zero-click 69%–93%; AI Overviews ~2B users/month).
- Digiday - The state of AI referral traffic in 2025 (ChatGPT referrals +206%).