What Is AEO? Answer Engine Optimization vs GEO vs SEO

What is AEO? AEO, or answer engine optimization, is the work of getting your business named, and ideally linked, inside the answers that ChatGPT, Perplexity, Gemini, Claude and Google AI Overviews write, instead of only ranking among search results. In marketing terms it is the step after SEO: SEO gets you found when people search, AEO gets you recommended when they ask an assistant. GEO (generative engine optimization) started from a different angle, and the comparison below shows where AEO, GEO and SEO differ and why, today, the work overlaps.

This guide is written by someone building the tool that measures AEO, so it has more numbers than adjectives. Every number links to its source at the bottom, with the date I last checked it. What I could not verify, I cut.

What is AEO, in one sentence

When a customer asks ChatGPT "who is the best implant dentist in Austin", they do not get ten links. They get two or three names and, sometimes, the sources those names came from. AEO is the work of being one of those names, or one of those sources.

SEO brings the person to your site when they search. AEO acts earlier, while the assistant is building the answer. The two coexist and help each other, but they answer different questions: "can I be found?" and "can I be cited?".

AEO vs GEO vs SEO: what's the difference

AEO started with featured snippets and voice assistants: the aim was to be the single answer, the one a smart speaker reads out or Google shows above the links. GEO, named in a 2023 research paper by Aggarwal et al., is about being one of several sources cited inside an answer that a generative engine writes; the paper introduces "Generative Engine Optimization (GEO)" and reports that its methods could raise a source's visibility in generative engine responses by up to 40% ^[9]. SEO is about the list of links.

Today the two labels describe largely the same work. Featured snippets and voice answers still exist, but most "answers" are now generated by ChatGPT, Perplexity, Gemini or Google's AI, and the levers are the same: a direct answer at the top, facts a machine can verify, consistent information across sources. This guide uses AEO for both, as many practitioners do; what differs is the surface you measure, so whatever the label, always ask how the result is measured. The next sections show, with sourced data, why ranking on Google and being cited by AI are no longer the same thing.

How an AI assistant builds an answer

To know where to act, you need to know what happens between the question and the answer. The flow is the same for every engine with search.

A page can be strong on Google and absent here: the engine picks the sources it can extract and confirm, not the best-ranked ones.

The practical consequence: the same page can rank first on Google and be nearly invisible in an AI answer, or the reverse. That is why AEO has to be measured separately from SEO.

Why it matters now: the verified numbers

Three data points are enough to see the size of the shift, and none of them comes from a software vendor.

In June 2025, AI platforms sent more than 1.13 billion visits to the world's top 1,000 websites, 357% more than in June 2024. Google Search sent 191 billion in the same month: AI is still small in absolute terms, but it is the fastest-growing source, and ChatGPT alone accounts for more than 80% of those visits ^[2].

The second number is the one that should stop anyone who already does SEO well: ranking first on Google is not enough to get cited.

Source: Ahrefs, 15,000 long-tail queries compared across Google, Bing and four assistants [3]. Overall average: 11–12%.

A 5W study reaches the same conclusion from another angle over 24 months: the overlap between Google's top results and AI-cited sources fell from about 70% to under 20% ^[4]. Perplexity is the exception because it leans on search results more than the others; ChatGPT, Gemini and Copilot all sit around 8 to 9% in the Ahrefs data ^[3].

What happens to clicks

There is a flip side: when Google shows an AI Overview, clicks on traditional results fall. Pew Research tracked the real behavior of 900 US adults for a month: with an AI summary on the page, users clicked a result in 8% of searches, against 15% without one; links inside the summary itself were clicked in 1% of visits ^[5]. Seer Interactive, measuring 53 client accounts, found an organic CTR of 1.31% in December 2025 and 2.36% in February 2026 on queries where an AI Overview appeared, against 3.82% on queries without one in February 2026 ^[6].

Source: Pew Research Center, 900 US adults, March 2025 [5]

The traffic that does arrive from AI is worth more, though: in Semrush's study of 500+ high-value topics, a visitor coming from an AI engine converts 4.4 times more often than one from traditional organic search, because they finished their research inside the assistant before clicking ^[7]. Fewer clicks, but clicks from people who have already decided. The studies behind the AI referral traffic conversion rate, and where the premium does not hold, get their own analysis.

Where the sources come from: the good news for small businesses

Yext analyzed 6.8 million citations produced by ChatGPT, Gemini and Perplexity on 1.6 million queries per engine between July and August 2025. The result overturns the idea that everything runs through Reddit or big portals (Reddit matters, but its real share of AI citations depends on the engine and on how you count).

Source: Yext, 6.8 million citations, ChatGPT + Gemini + Perplexity, July–August 2025 [1]. Website and listings together make 86%.

86% of citations come from surfaces the business controls directly ^[1]. For a small business this is the most important line in this guide: you do not need to be a giant. You need your website, your Google Business Profile and your industry listings to say the same things, in a way a machine can read.

Why a "beautiful" site can be unreadable to an AI

Assistants do not browse like a person: they do not scroll, do not interpret a layout, do not wait for an animation to finish. They read text and structured data and extract statements they can attribute to a source. A page with the answer in the fourth paragraph, after an atmospheric intro, is a page that does not answer.

There is also a measurement problem. Cloudflare publishes the ratio between pages read by AI crawlers and visits sent back to sites: in the 28 days to July 21, 2026, Anthropic read about 2,237 pages for every visit it sent, Perplexity 225, OpenAI 217; Googlebot sits around 5 ^[8]. The ratios improve month by month, but the point stands: most of what AI reads about you leaves no trace in your analytics, and Search Console will never tell you whether ChatGPT cites you. It also means the crawlers have to be let in: here is which AI crawlers to allow in robots.txt and llms.txt.

Source: Cloudflare Radar, AI Insights [8]. A year earlier Anthropic was at tens of thousands to one: the direction is right, the scale is still another world.

What AI rewards: six signals

From the data above and the audits we run every day, these are the signals that count for an ordinary business. The order is a reading order, not a measured ranking.

1. Answer first. A heading that is the customer's question, the answer in the first two sentences, then the detail. It is the format this page tries to follow.
2. Attributable facts. Numbers with source and date, exact names, prices when they can be published. An engine cites more readily what it can verify.
3. The same information everywhere. Name, founding year, address, phone, services identical across website, Google Business Profile, directories and profiles. That is Yext's 86% ^[1].
4. Structured data. Organization or LocalBusiness, FAQPage, Article schema. They tell the machine what you are without making it guess.
5. Extractable formats. Tables, lists, one-line definitions, sections that stand on their own. Less atmospheric prose.
6. Declared freshness. A real update date and content revised when a fact changes. AI prefers sources it knows were re-checked.

What no list can do is tell you which of the six you are missing. That takes measurement.

How to measure AEO: is ChatGPT citing you?

An "AI visibility score" that goes up when you tick a box measures nothing. Real measurement has four fixed ingredients.

1. A stable set of questions. 20 to 30 questions a customer would really ask an assistant to find a business like yours: half with your name, half without. The same ones, every time.
2. Several engines. ChatGPT, Perplexity, Gemini, Claude and Google AI Overviews answer differently and draw on different sources, as the Ahrefs chart shows. One engine tells a fifth of the story.
3. The sources, not just the mention. For each answer, which pages were cited. That is where you find who gets cited instead of you and which directory listing you need to fix.
4. Repetition over time. Answers change week to week. The trend over a month counts, not the lucky screenshot.

For what this looks like on a live site, see a real check of which AI cites a business, and who it cites instead.

The guide to the Today page explains each part of that screen.

If it isn't verified, it doesn't count. The score doesn't measure what you promised to do; it measures what is actually live and readable.

How to start, even without tools

1. Write the fact sheet. Exact name, year, location, phone, services, people. One page, approved. Every other surface must say the same things.
2. Do the first round by hand. Your 20 questions to ChatGPT, Perplexity and Gemini. Note whether you appear, where, and who appears instead of you. Write down the cited sources. To go faster, the free AI citation checker asks ChatGPT, Perplexity and Gemini one real question and shows who gets cited. For a quick first reading, the free AI visibility check shows whether the main AI bots can read your site and, with an email, which engines cite it.
3. Fix the sources you control. Website, Google Business Profile, industry directories, reviews: the 86% ^[1].
4. Rewrite the pages that matter with the answer at the top. About, services, pricing, FAQ. Every section must stand alone.
5. Add structured data and a machine-readable facts page.
6. Repeat the measurement every 30 days and compare with the first round. Change one thing at a time, so you know what worked.

Guides by platform and topic

This page is the hub. Each guide below goes deeper on one platform or one question:

• Online stores: AEO for ecommerce product pages, and step-by-step guides to get a Shopify store cited by ChatGPT, a WooCommerce store cited by ChatGPT or a Wix store cited by ChatGPT.
• Shopify and ChatGPT: how Shopify's ChatGPT integration and AI crawlers decide which stores get found.
• Case studies: how a luxury tour operator became citable by ChatGPT, Gemini and Claude, and how a women's wellness ecommerce brand won its hardest Google category.

Frequently asked questions about AEO

Sources

1. [1] AI Doesn't Rank, It Cites. And 86% of Its Sources Are Brand-Managed · Yext · October 2025 · accessed 2026-09-29
2. [2] AI referrals to top websites were up 357% year-over-year in June, reaching 1.13B · TechCrunch on Similarweb data · July 2025 · accessed 2026-09-29
3. [3] Only 12% of AI Cited URLs Rank in Google's Top 10 for the Original Prompt · Ahrefs · 2025 · accessed 2026-09-29
4. [4] Overlap Between Top Google Rankings and AI-Cited Sources Has Collapsed From 70% to Under 20% · 5W Public Relations · 2026 · accessed 2026-09-29
5. [5] Google users are less likely to click on links when an AI summary appears in the results · Pew Research Center · July 2025 · accessed 2026-09-29
6. [6] AIO Impact on Google CTR: 2026 Update · Seer Interactive · April 2026 · accessed 2026-10-14
7. [7] AI Search SEO Traffic Study · Semrush · June 2025 · accessed 2026-09-29
8. [8] The crawl before the fall of referrals: understanding AI's impact on content providers · Cloudflare · 2025, Radar data as of July 2026 · accessed 2026-09-29
9. [9] GEO: Generative Engine Optimization · Aggarwal, Murahari, Rajpurohit, Kalyan, Narasimhan, Deshpande (arXiv; KDD 2024) · November 2023, revised June 2024 · accessed 2026-10-14