Generative Engine Optimization Grows Into a Full SEO Discipline

From an academic coinage to a marketing category

Generative engine optimization, or GEO, started as a research term. Within about three years it has become a sales category, a conference circuit and a budget line. The idea comes from a paper posted to arXiv in November 2023 and presented at KDD 2024. It set out to formalize how content creators could stay visible when AI systems answer questions directly instead of returning a list of links.25 The authors described GEO as a black-box optimization framework. They built a benchmark, GEO-bench, from a large set of queries across multiple domains, and they reported that their methods raised a source's visibility in generative answers by as much as 40%.26

The practitioner definition in 2026 is broader. Industry guides describe GEO as shaping content and a brand's wider digital presence so that ChatGPT, Google AI Overviews, Perplexity, Claude and Copilot retrieve, cite and recommend it.11 The goal has shifted from ranking a URL to being included in the answer the AI writes.16

What the original research found, and what it didn't

Practitioners cite the founding paper constantly, and they often overstate it. The strongest methods were adding citations to credible sources, adding quotations and adding statistics. Each produced gains of more than 40% across various queries.21 Changes to style also helped. Better fluency and simpler wording improved visibility by roughly 15–30%.21 Keyword stuffing, the old SEO habit, did poorly in the generative setting.27

The most interesting result is about who benefits. In the paper's tables, the Cite Sources method raised visibility for the fifth-ranked source by 115.1% and cut it by 30.3% for the top-ranked source.21 One explainer describes this as a democratizing effect. When every source optimizes, lower-ranked sites catch up with the leaders.25

The study has limits that much of the marketing ignores. The experiment used Google Search to pull the top five sources for each query and had GPT-3.5-turbo write the cited answers.24 One critique argues that this zero-sum setup with only five sources inflates the relative gains, and that the 40% figure is a best case, not an average or a guarantee.24

The secondary coverage also disagrees on basic facts. Some write-ups say the paper tested nine methods.2324 Others say six strategies across ten search engines.2930 Credit is often given to Princeton alone, but one analysis points out that the lead author was at IIT Delhi. Other summaries list Georgia Tech and the Allen Institute for AI among the institutions.2527 These details matter less than they appear to, but they show how loosely the field handles its own evidence.

Why it matters: the click is shrinking

GEO took off because of what is happening to clicks. HubSpot reports that when Google shows an AI summary, users click a traditional result 8% of the time, compared with 15% when no summary appears.1 Ahrefs analyzed 300,000 keywords and found that click-through for the top-ranked page on AI Overview queries fell from 7.3% to 1.6% between December 2023 and December 2025.4 Seer Interactive studied informational queries and found organic CTR on AI Overview queries down 61%.4

The exposure is large. One guide puts AI Overviews on nearly 55% of Google searches.10 Another says they reach more than 2.5 billion people a month.8 The chatbot side is also less concentrated than before. One trend report says ChatGPT's share of generative AI traffic fell from 86.7% to 64.5% over the year to January 2026, while Gemini rose from 5.7% to 21.5%.15 For brands, that means tracking several engines rather than assuming one platform matters.

The alphabet-soup problem

The industry has not agreed on what the terms mean. Coverage splits into at least four camps:

• GEO as the umbrella. Similarweb treats GEO as the broader discipline. It includes answer engine optimization (AEO) and adds share of model, sentiment and control of the brand narrative.16
• GEO as the model layer. Semrush separates them by mechanism. AEO covers retrieval and citation when a user asks a question. GEO covers how a brand already appears in a model's training data.6
• GEO as a separate channel. Dyad Marketing draws the line by surface. AEO covers answers inside search results such as AI Overviews and featured snippets. GEO covers chat tools such as ChatGPT and Claude.8
• They are the same thing. Frase says AEO, LLMO, GSO and AIO are all other names for GEO.17

Some practitioners reject the labels altogether. In one Reddit thread, a commenter argued that AI search tools are search, so all of this is just SEO.9 My view is that the skeptics are mostly right about the mechanics and wrong about the economics. The label matters because budgets, tools and job titles are now organized around it.

Google's position: it's still SEO

Google has taken a clear position. According to coverage of AI optimization guidance Google published in 2026, its message was that AEO is still SEO for brands that want to appear in AI Overviews and AI Mode.3 Frase dates this guidance to May 2026.10 That fits how Google's systems are described: AI Overviews draw on Google's own search index, and Gemini relies heavily on it too.16

The data partly supports Google. One analysis says 38% of AI Overview citations come from pages ranking in Google's top 10, which shows that organic ranking still matters. It also means most citations come from elsewhere.10 Almost every major SEO publisher says the same thing in different words: AEO does not replace SEO and depends on it.1267 One guide describes traditional SEO as the infrastructure layer that answer-first tactics build on.2 The technical basics still apply in an AI-first world: crawlability, indexation, internal linking and structured data.

Where GEO goes beyond SEO

The real changes are in two areas: authority off your own site, and measurement.

On authority, several sources say much of the work has moved away from a brand's own pages. One trend report says 68% of AI citations come from off-site sources. It also claims that spreading content across many publications can raise AI citations by up to 325%.15 By that reading, digital PR, review platforms, YouTube and genuine Reddit participation now count as GEO tactics.15 SEO.com makes a similar point. Generative engines do not rank results, so the aim is to get the brand cited or mentioned, through guest posts, original thought leadership and community engagement.20 Dyad adds that chat tools rely more on third-party mentions and "best of" lists, while AI Overviews favor pages that already rank well.8

On page structure, the advice is consistent. Put a direct answer first, write sections that can be extracted on their own, keep entity names consistent and use schema markup.5617 Frase argues that freshness matters more than in classic SEO and claims that half of the content cited in AI answers is less than 13 weeks old.17

Measurement is where SEO tools fall short. Rank trackers do not show how often an AI cites a brand, so a new category of GEO platforms queries AI engines directly.11 One vendor's list shows how much money is involved. AirOps lists $60M in total funding, Peec AI a $29.1M Series A, and Scrunch AI and Evertune $19M Series A rounds each. HubSpot acquired XFunnel in October 2025.12 The GEO Conference charges $1,100 for a 150-seat room and says its first three events sold out.14

Treat the numbers with care

Much of the GEO evidence comes from companies that sell GEO. Go Fish Digital says AI-driven leads converted at 25 times the rate of traditional search leads in its own client work.13 Frase cites a figure of 4.4 times higher conversion for AI visitors.10 These figures differ widely and are not independently audited, so they should be read as marketing claims, not benchmarks. Even the evidence base admits the results are unstable. One review notes that AI citations swing 40–60% from month to month.29 That should make anyone cautious about a vendor dashboard that reports precise gains.

The verdict

GEO is real, but it is less new than its marketing suggests. The research shows that how content is written affects whether a generative engine cites it. Verifiable statistics, attributed quotes and clear prose help, and keyword stuffing does not.2127 Practitioners agree that SEO fundamentals still carry most of the weight, and Google says the same.36 What has changed is the reward. A brand mentioned inside an answer may never get the click, so the job now includes building citations off-site and measuring visibility in ways classic SEO never needed.

The practical response for most teams is to treat GEO as a layer on top of SEO, not a replacement. Keep the technical foundation sound, publish original data that machines can cite, earn mentions on sites you don't own, and measure across more than one AI engine. Teams that drop SEO to chase GEO are likely to lose on both.