GEO vs SEO: what's the difference?

GEO vs SEO compares two ways of being found. SEO (search engine optimization) earns rankings and clicks on Google and Bing. GEO (generative engine optimization) earns mentions and citations inside answers written by ChatGPT, Gemini, Microsoft Copilot and Google AI Mode, which mostly draw on pages that already rank, often on other sites.

KPI family	SEO	GEO
Visibility	Impressions and keyword rankings	Mention rate and AI visibility score
Prominence	Position on the results page	Position among the brands named in the answer
Sources	Backlinks and referring domains	Pages and domains cited in the answers
Competition	Sites ranking above yours	Brands named instead of yours
Traffic	Clicks, click-through rate, organic sessions	AI referral visits, when people do click
Where the data comes from	Search Console, rank trackers, analytics	The same prompts, run repeatedly on each engine

What GEO and SEO share

GEO and SEO share the retrieval step. Before an AI engine writes an answer, it searches, and it can only cite what that search returns. Google describes its AI features as relying on "our core Search ranking systems to retrieve relevant, up-to-date web pages from our Search index", a technique known as retrieval-augmented generation.

Academic work points the same way. In C-SEO Bench, a 2025 benchmark accepted at NeurIPS, researchers found that "the initial ranking of documents retrieved by the search engine plays a far more dominant role" in what a language model cites than any of the content rewrites they tested. In practice, GEO and SEO also need the same foundations: pages that crawlers can reach, that are indexed, and that answer a real question better than the alternatives.

Where GEO and SEO differ

The sources. In SEO, you work mostly on your own pages. In GEO, the answer often cites someone else's page about you. A 2025 University of Toronto study compared Google results with the citations of OpenAI's search-enabled GPT-4o on the same queries. For U.S. software queries, Google returned 43.7% brand sites, 45.4% earned media (independent reviews and publishers) and 10.9% social platforms. The AI citations were 72.7% earned and 26.7% brand, with social sources negligible.

The scoreboard. SEO counts positions and clicks on one results page per query. GEO counts how often a brand is named and which pages are cited, across answers that change from one run to the next.

The state of the research. SEO rests on decades of practice and official documentation. GEO research is recent, and its findings conflict. The 2023 paper that named GEO found that keyword stuffing, a classic SEO tactic, gave "little to no improvement" in AI answers. C-SEO Bench then found that classic SEO, meaning a better retrieval ranking, beat the best GEO rewriting methods in all six of its domains.

Do you need both GEO and SEO?

Yes, with SEO first. The authors of C-SEO Bench put it plainly: "we believe C-SEO will not replace SEO, but will complement it." Be wary of the oft-quoted promise that GEO rewrites boost visibility "by up to 40%". That figure was measured on a simulated engine in the 2023 paper, and the same kinds of rewrites proved "largely ineffective" in C-SEO Bench's broader tests. The generative engine optimization entry tells the story of both papers.

What GEO really changes is which pages you work on. Take the prompt "Which payroll software works best for a small restaurant?" An SEO plan pushes the vendor's own payroll page up the rankings. A GEO plan starts from the answer: if the engines keep citing two restaurant-industry blogs and a review site, those three pages decide whether the vendor is named. For each prompt that matters, list the pages the engines cite, then sort them. A cited page that names your competitors and leaves you out is an outreach target, part of your citation gap. A page of yours that ranks but is never cited needs clearer, more specific answers. A page that is cited again and again deserves attention first, whoever owns it.

How to measure GEO and SEO

SEO has mature, first-party data: Search Console reports impressions, clicks and average positions for your own site. GEO has no equivalent across engines, since Google's Generative AI performance report covers only Google's own AI features. The data comes from asking each engine the questions your buyers ask, again and again, and logging the brands named and the pages cited. An AI visibility score summarizes the first part; citation counts per page cover the second.

Hawkscan lists the pages ChatGPT, Microsoft Copilot, Gemini and Google AI Mode cite in their answers to your prompts: how many answers cite each page, its average position among the cited pages and whether it mentions your brand, plus the eight most cited domains, with yours highlighted.

Common questions

Does GEO work better than SEO?

Not on current evidence. In C-SEO Bench, the best classic SEO results beat the best GEO rewriting methods in every domain tested, and the gains from GEO shrank as more sites adopted the same methods. GEO is best seen as a layer on top of SEO that changes your priorities, not as a substitute for it.

Can a brand be visible in AI answers without ranking?

Yes, through other people's pages. An engine can name a brand it learned about in training, or because a review or comparison that ranks mentions it, even when the brand's own site ranks nowhere. That is why GEO tracks the pages that talk about you, not only your own. For the answer-focused view of the same question, see AEO vs SEO.