In the early days of generative AI, Türk SEM kept its distance. But we could see which way the technology was moving. Before long, people searching for a product or a service would ask an AI. The answer would be more personal and more accurate than a page of blue links. So we built a methodology for that moment and named it AIO (AI Optimization). We also put our claim on record in a whitepaper: we were among the first agencies in the world to do this work.
Since then, three acronyms have been competing for the same job: GEO, AIO and AEO. Clients ask, students ask, colleagues ask each other in meetings: which one is correct, and which one do people actually use? For this article I did not guess. I counted. A practitioner survey, search volume, academic papers and Google Trends, side by side. Then I went after the more interesting question: why.
The Short Answer: GEO
Five different yardsticks. GEO leads on every one of them.
| Yardstick | GEO | AEO | AIO |
|---|---|---|---|
| Practitioner survey: term in use | 42% | 14% | too rare to measure |
| Practitioner survey: awareness | 84% | 61% | below 50% |
| Academic papers (arXiv) | 45 papers | 3 papers | ambiguous, cannot be counted |
| Google Trends, Turkey | 73 | 37 | 36 |
| Monthly searches, English term | 1,300 | 720 | ambiguous, cannot be measured |
Survey: Search Engine Land, 342 respondents, fall 2025. arXiv count from September 2026. Trends value from August 2026. Search volume from 2025.
The industry has made up its mind. The question is why, and to answer it you need to know where the three acronyms came from.
Three Acronyms, Three Birthdays
AEO: The Oldest
AEO stands for Answer Engine Optimization. Its roots predate generative AI. Google launched the Knowledge Graph in 2012 and featured snippets, the answer box above the results, in 2014; voice assistants followed. The user asks a question, the engine returns a single answer. The work of becoming the source of that one answer was named AEO.
I noticed AEO being used for AI answers around 2024. But the term was cut to fit the classic answer box. Being recommended by an AI is a different thing, and AEO had no room for it.
GEO: The Name That Came From Academia
GEO has a birth certificate. On November 16, 2023, a team from Princeton and Georgia Tech, led by Pranjal Aggarwal and Vishvak Murahari, posted "GEO: Generative Engine Optimization" on arXiv, the preprint archive. The paper was presented at KDD, one of the leading data mining conferences, in August 2024. It was the first work to coin the term, define it and supply a way to measure it.
AIO: The Name We Chose
We settled on AIO inside the agency in 2024; the Princeton team started using GEO at almost the same time. When we read their paper, we stuck with AIO. The work we were describing was not only about getting into a generative engine's answer. It was about measuring, testing and managing how a brand shows up in AI recommendations. We ran our first tests in March 2024 and published the methodology and the whitepaper in July 2025.
What Google Trends Shows
I opened Google Trends for the last five years in our home market, Turkey, and put the three acronyms side by side. The mechanics are the same in every country, and I will get to that.
The first thing you notice: all three acronyms had a search baseline long before AI. AIO, GEO and AEO are abbreviations people were typing years before ChatGPT. At the end of 2023 all three are on the chart: geo 47, aio 35, aeo 30. In August 2026 the picture is geo 73, aeo 37, aio 36. The five-year average: geo 60, aio 37, aeo 36.
The real story is in the curve. Geo runs flat until early 2024. Then it starts climbing, jumps in the fall of 2024 and peaks in early 2026. Aio and aeo stay in the same band for five years. Only one acronym broke away from its baseline.
I checked what sits behind that baseline with our own keyword tool (September 2026, Turkey). People typing "geo" are mostly looking for the games Geometry Dash and GeoGuessr. People typing "aio" want liquid coolers and all-in-one PCs. And "aeo" is the customs status Authorized Economic Operator. Every acronym had another life before AI, and the same collisions exist in every market: GEO is geography, AIO is a computer, AEO is a customs certificate. That is the baseline in Trends. The signal is the one line that breaks away from it: GEO.
Which Word the Industry Picked
In the fall of 2025, Search Engine Land surveyed 342 of its readers. 84% recognized GEO and 61% recognized AEO. Asked "which term do you use?", 42% said GEO and 14% said AEO. The same study measured quarter-over-quarter growth in Google Trends: GEO 121%, AIO 99%, AEO 56%.
Search volume points the same way. Another study asked three AI systems for the monthly search volume of each term; the only one that gave numbers put GEO at 1,300 and AEO at 720. The plain phrase "AI SEO" crushed both: more than 250,000. That detail matters. I am saving it for the end.
Still, the picture is not one-sided. HubSpot named its product "HubSpot AEO." G2 renamed its category from GEO to AEO. In September 2025, Forbes ran a piece titled "Stop Saying GEO, It's Called AEO." The case for AEO is easy to follow: everyone understands "answer," and "geo" collides with geography. The two largest SEO software vendors picked neither acronym; one says "AI Visibility," the other says "Brand Radar."
Outside the English-speaking world the picture is even clearer. In Turkey, the trade press publishes lists of "the best GEO agencies," and agencies put GEO in the headline with AEO and AIO in the fine print. In Germany, agencies call themselves GEO agencies and often pair the term with LLMO (Large Language Model Optimization).
The real signal, for me, came in a conversation. In early 2026 I sat down with Prof. Dr. Hülya Bakırtaş at Aksaray University, in the Management Information Systems department, to talk about AI. When she told me she was covering GEO this year as part of her Internet Marketing course, that was the moment I knew: GEO had been fully accepted by the industry. I mentioned that we had given this work the name AIO. From that day on it was clear to me that Türk SEM had to adopt the term GEO as well.
What Academia Says
Academia is even more decisive. I counted the papers on arXiv that contain the phrase "generative engine optimization": 45. Papers containing "answer engine optimization": 3. Most of the GEO papers appeared in the last year; the topic is now a research field of its own. Wikipedia files its article under GEO, with AEO and AIO listed as alternative names. The same article adds an honest note: as of early 2026 there is no consensus that cleanly separates the terms.
Why GEO Won
I see four reasons.
The birth certificate. GEO has a peer-reviewed paper, a conference talk and a measurable experimental protocol. Nobody knows who said AEO first, or when. AIO was first used by Türk SEM. After us, many agencies in Turkey and around the world picked up AIO. In truth the idea was in the air everywhere at once: GEO, AI SEO, AEO and AIO all surfaced in the same window. What we did first was define a methodology under the name AIO and offer it as a service. Once academia adopts a term, the trade press cites it, searches rise, and academia writes even more. The loop feeds itself.
It sounds like SEO. Search Engine Optimization, Generative Engine Optimization: same pattern, one word swapped, everything else familiar. That is how an industry learns a new concept with the least resistance.
The word is right. ChatGPT does not find an answer; it generates one. "Generative" describes what the engine does. "Answer" describes the snippet box of 2014 just as well, and does not tell the new thing apart from the old.
History repeats. The term SEO itself was used independently by five people between 1995 and 1997; one writer popularized it and the rival names faded. Naming wars are nothing new, and they always end the same way: the name that gets written the most is the name that stays.
Why AEO Is Still Alive
Because there is a real difference, even if it is small.
| AEO | GEO | |
|---|---|---|
| Target surface | Direct answer boxes: featured snippets, "People also ask," voice assistants | Generative chat answers: ChatGPT, Gemini, Perplexity |
| Mechanism | Your text is lifted as is and shown as the answer | Dozens of sources are blended; you become a source or a recommendation inside the answer |
| Unit of optimization | Passage and page format: question-and-answer structure, short clear paragraphs | Brand and entity: consistent mentions across the web, third-party sources, authority |
| Age | Knowledge Graph 2012, snippets 2014 | November 2023 |
So AEO is the job of "take the answer from us," and GEO is the job of "cite us, recommend us." Separate on paper. In practice the industry uses them interchangeably, because Google AI Overviews is where the two worlds meet: it extracts text and generates an answer at the same time. That overlap is one reason AEO refuses to die.
Why AIO Fell Behind
This section is about our own name, so I owe you honesty. In Trends, AIO never broke away from its baseline, and the reason was out of our hands.
Google launched AI Overviews in May 2024. The industry quickly shortened the feature to "AIO." Today, when you see AIO in an English text, it usually means AI Overviews: a Google feature, not an optimization discipline. When one acronym points in two different directions, neither meaning builds a clean search signal.
The second reason hides in the raw volume. "AI optimization" gets around 74,000 searches a month; the spelled-out term gets 590. The big number is misleading: it mixes in model training, AI in business processes and software optimization. It does not measure a discipline. It measures ambiguity.
None of this made us give up. I will explain why below.
Google's Answer: It Is All SEO
Google itself enters the debate with a single sentence. Search Central, Google's documentation for site owners, updated the page "Optimizing your website for generative AI features on Google Search" in July 2026. Its key sentence: optimizing for generative AI search is optimizing for the search experience, and thus still SEO. The same page lists what you do not need: a special llms.txt file, chunking your content into fragments, rewriting existing text for AI, or overloading structured data.
I agree with that sentence. On Google and on many other search engines, answers now appear above the results, and this is becoming a permanent part of daily life. AIO, AI Overviews and GEO now sit inside SEO, and they all pull in one direction: giving the user the right answer and pointing them to the right company.
And the decision is no longer made by a list of rules. It is made by AI systems that learn and decide. When a user looks for a product, a service or a company, Google will return more accurate results thanks to the mechanisms that started with RankBrain, the learning ranking system Google introduced in 2015. Google has been working on exactly this problem, finding the right company and the right website, since 1998. The AI answer is built on top of that foundation, not in place of it.
Why We Still Say AIO
Over time we saw that the industry's GEO work covers different ground from our own AIO methodology, and that AIO actually covers more ground than GEO. So we stand behind AIO and position it as the umbrella. We have adopted the term GEO as well, and we call ourselves Turkey's pioneering GEO agency. Our name is AIO; GEO is a field of work under it.
Let me walk through the diagram. AIO is the umbrella: company-specific strategy, recommendation tracking and measurement dashboards, prompt test loops, data mapping and authority building make up its core. Below it sit two branches. GEO: being cited and recommended in the answers of generative engines. Google AI Overviews: the AI answer above the search results, along with AI Mode (Google's chat-style search), featured snippets and voice assistants. What the industry calls AEO sits right inside that second branch.
I tie our head start to dates, not to a name. We settled on AIO as our internal name in 2024 and ran our first tests in March 2024. In July 2025 we published the methodology and the whitepaper and announced AIO publicly. Those dates are on record. Not "we said it first," but "we did it first, and we documented it." I wrote about the commercial future of GEO in a separate article.
Behind all this sits a bigger goal. For years we have been working to make Türk SEM a global agency that serves clients worldwide. Being among the first agencies in the world with the AIO whitepaper, and publishing our website in three languages, are both part of the same dream: becoming a global agency.
Which Term Should You Use?
In conversation and in search, say GEO. The industry, academia and the trade press meet there; the person across the table understands immediately.
In proposals and contracts, spell it out: "Generative Engine Optimization." That closes the door on the geography mix-up.
If you use AIO, always expand it: "AIO (AI Optimization)." Otherwise your reader hears AI Overviews.
Use AEO when you are talking about featured snippets and voice assistants, not as an umbrella.
And do not forget the detail from earlier: "AI SEO" is searched more than all the acronyms combined. People are not looking for a new discipline. They are looking for the AI version of the work they already know. Google's "still SEO" and that number are saying the same thing.
In Short
The most-used term is GEO. It leads in surveys, in academia, in markets like Turkey and Germany, and in Trends; the reason is a peer-reviewed birth certificate and a pattern that sounds like SEO. AEO is older and still useful for answer boxes, but it does not cover AI recommendations. AIO could not break away from its baseline because the acronym collides with Google's AI Overviews. Google counts all three as SEO. So do we; the only difference is that we named our umbrella AIO, and we stand by that name.
Frequently Asked Questions
Are GEO and AIO the Same Thing?
They serve the same goal, but they are not the same thing. GEO is the work of being cited in the answers of generative engines. AIO is the name of Türk SEM's methodology, and it brings GEO, the work on Google AI Overviews, measurement and strategy under one umbrella. So GEO is a field of work inside AIO.
What Is the Difference Between AEO and GEO?
AEO wants your text to be lifted as the answer: featured snippet, voice assistant, the "People also ask" box. GEO wants you to appear as a source or a recommendation inside a generated answer. The industry often uses the two interchangeably because the two worlds overlap in Google AI Overviews.
Which Term Does Google Use?
None of them. Google's official guide says that optimizing for generative AI search is still SEO. The major software vendors leave the acronyms out of their product names too.
Which Term Are People Actually Searching For?
On their own, the acronyms lead elsewhere: "geo" to games and geography, "aio" to all-in-one PCs and liquid coolers, "aeo" to a customs status. We measured the curve in Turkey, and the ambiguity of the acronyms is the same in every market. The only acronym searched with its AI meaning that broke away from its baseline is GEO. The trade press calls them "GEO agencies," too.
