Short answer
GEO is the work of getting a business named and quoted inside AI-generated answers. SEO aims at a ranked list of links. GEO aims at the paragraph an assistant writes. They overlap, and they are not the same job: only about 12% of the URLs assistants cite also rank in Google’s top ten.
Key takeaways
- SEO competes for a position. GEO competes to be the source a model quotes when it writes one paragraph.
- Ahrefs put four assistants against 15,000 long-tail queries: about 12% of cited URLs sat in Google’s top ten, and for ChatGPT the URL overlap was 8% (vendor study, 2026).
- The peer-reviewed work says what earns a citation: real statistics, direct quotations, cited sources. Keyword stuffing changed nothing (Aggarwal et al., KDD 2024).
- Most of the work is not writing. It is being crawlable, indexed, and described identically everywhere a model can check.
A practice owner told me his agency had him on a twelve-month SEO plan and he was finally ranking third for his main service. Then his daughter asked ChatGPT who she should see, and it named three practices, none of them his. Both things were true at the same time, and that is the part worth understanding.
What the letters actually stand for
GEO is generative engine optimization: the work of being named, described correctly and quoted inside an answer that an assistant writes. The term comes from a 2024 research paper that tested which content changes moved citation rates. It is not a rebrand of SEO, and it is not a product you buy.
You will also see AEO, answer engine optimization, and AI SEO used for roughly the same thing. The label matters less than the change underneath it: the thing a person reads is no longer a list you can hold a position in. It is a paragraph somebody else wrote about you.
Where the two jobs diverge
Search asks which pages deserve to rank. An assistant asks a different question: which sources can I safely repeat. That second question rewards things a ranking never measured, like whether your details agree across independent sites, and whether a paragraph on your page can be lifted without the rest of the page around it.
| Search engine | AI assistant | |
|---|---|---|
| What it produces | A ranked list of links | One written answer, sometimes with sources |
| What it rewards | Relevance and authority for a query | Sources it can verify and safely repeat |
| Where the click goes | To the page you optimised | Often nowhere, so being named is the win |
| How you measure it | Position, impressions, clicks | Named or not named, on a fixed set of questions |
| What fixes a bad result | Better pages, better links | Consistent entity data, then better pages |
How much does ranking carry over?
Less than you would hope. Ahrefs asked four assistants 15,000 long-tail questions and compared what they cited against Google and Bing. About 12% of cited URLs also ranked in Google’s top ten, and for ChatGPT the URL-level overlap was 8%. That is a vendor study rather than peer-reviewed work, and the direction matches what practices report.
Read it as overlap, not replacement. Ranking still brings people who search, and it feeds the indexes several assistants read from. It simply does not settle the other question, which is whether a model will put your name in a sentence.
What the evidence says actually moves a citation
The strongest study on this tested content changes across roughly 10,000 queries and found that adding real statistics, direct quotations and cited authoritative sources raised visibility in generative answers by roughly 30 to 40%. Keyword stuffing produced nothing measurable. That is one finding, and it is the most useful instruction available.
In practice that means writing the number you actually have, saying where it came from, dating it, and quoting the person who said it. A page that reads like a brochure gives a model nothing to lift. A page that says "we place 40 implants a year, here is our five-year failure rate, measured this way" gives it a sentence it can repeat and attribute.
Who should not start here
If your site cannot be crawled, or is not indexed in Bing and Google, none of this applies yet, and no amount of writing will fix it. If your name, address and credentials disagree across your listings, fix that first: it is cheaper than content and it moves answers faster. And if you are hoping for clicks rather than mentions, be honest about the trade. Many of these answers end without anyone visiting a website at all.
Questions people ask
Is GEO just SEO with a new name?
No. They overlap and they optimise for different outputs. Search competes for a position in a list. GEO competes to be the source an assistant quotes in a written answer. Ahrefs found only about 12% of AI-cited URLs also rank in Google’s top ten.
Do I have to choose between SEO and GEO?
No, and the base work is shared. Crawlability, indexation, accurate business data and pages that answer real questions serve both. The differences show up afterwards, in how you write a page and in what you count as a result.
Who invented the term GEO?
It comes from a 2024 paper by Aggarwal and colleagues, presented at KDD, which tested which content changes raised visibility in generative engines. The industry adopted the term afterwards, which is why you also see AEO and AI SEO used for the same work.
Can an agency guarantee I will be named by ChatGPT?
No, and a guarantee is a reason to walk away. Nobody controls what a model returns, results move between months, and the strongest predictor of citation is how established a domain already is. Ask instead for a measured baseline and a plan against it.
How do I know if any of it is working?
Keep a fixed list of about 20 questions, half buying questions and half about you by name, and run them monthly across the assistants while logged out. Record whether you were named, what was cited and what was wrong. Judge trends over three to six months.
Sources
- Aggarwal et al., "GEO: Generative Engine Optimization", KDD 2024 (peer reviewed): The origin of the term, and the finding that statistics, quotations and cited sources raised citation visibility roughly 30 to 40%.
- Ahrefs, AI search and Google overlap study (2026, 15,000 long-tail queries, vendor study): About 12% of AI-cited URLs rank in Google’s top ten; 8% URL overlap for ChatGPT.
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