What is AEO, and do you need it?

The concierge effect

Ask a hotel concierge for a good dentist and you won't get a list of forty. You'll get one name, maybe two, and you'll call the first. The dentist the concierge named gets the appointment. The others never knew they were in the running.

Answer engines work the same way. Someone asks "who's the best dentist in St. Petersburg?" and gets a short written answer with a few names in it. There's no second page to scroll to. Answer engine optimization is about being one of those names.

What an answer engine is

An answer engine is a search tool that replies with a written answer instead of a list of links. The best known are ChatGPT, Perplexity, Claude and Microsoft Copilot, plus Google's own AI Overviews and AI Mode, which now sit above or beside the regular results. They're the super intelligence assistants people now ask instead of searching, and the work of showing up in them goes by a few names: AEO, GEO (generative engine optimization) or SEO for AI.

Most of them still search the web before they answer. They run a search, read a handful of pages and write their reply from what they found. That's the heart of AEO: the answer can only name what the engine can find and read about you.

And they don't all search the same web. Google's AI Overviews and AI Mode draw on Google's own index. OpenAI says ChatGPT's search uses outside search providers, and its help pages name Microsoft's Bing. Anthropic lists Brave Search as a web search provider for Claude. Perplexity runs its own crawler and index, covering hundreds of billions of pages. So being easy to find on Google isn't enough: if Bing can't find you, ChatGPT may not either.

Why it matters now

Answer engines aren't a side channel anymore. OpenAI puts ChatGPT at 1.2 billion people a week. Google says more than 2.5 billion people a month use its AI Overviews, and that AI Mode passed 1 billion monthly users in about a year (Google I/O 2026).

When the answer is on the page, fewer people click through to compare. Larger studies show the same pattern. Ahrefs measured a 58% lower click rate for the top result when an AI Overview appears. Seer Interactive's 2026 update found clicks partly recovering, and one finding stands out: brands cited inside the AI Overview got 120% more clicks per impression than brands that weren't.

The visitors who do come from answer engines tend to be ready to act. On its own site, Ahrefs found that visitors from answer engines were 0.5% of its traffic but 12.1% of its signups. Semrush estimates the average one is worth 4.4 times a regular search visitor.

Being on the map doesn't guarantee being named, either. In BrightLocal's study of 200,000 local searches, Google Maps showed a tracked business in 66% of searches, but the answer engines named it in only 32 to 38%.

How answer engines choose who to name

No answer engine publishes its recipe. But research, and a lot of testing, point to the same few things.

What the web says about you

Answer engines lean on what others say about you. In an Ahrefs study of 75,000 brands, how often a brand was mentioned around the web tracked who appears in Google's AI Overviews far more closely than backlinks did (a correlation of 0.664, against 0.218 for backlinks). A later Ahrefs study across ChatGPT, AI Mode and AI Overviews found mentions on YouTube tracked most closely of all.

For local questions, your own website matters most. In the same BrightLocal study, businesses' own websites made up 42% of everything the answer engines cited, followed by Google Business Profiles at 29% and Yelp at 10%.

Facts they can quote

Answer engines like facts they can repeat. When researchers at Princeton and IIT Delhi rewrote web pages to add statistics, quotations and citations of credible sources, those pages showed up in generated answers up to 40% more often in their tests. Stuffing pages with keywords didn't help. It was a lab test, not a guarantee, but it points one way: be specific, and show where your facts come from.

Details that agree

The same business name, website, phone number and description everywhere, so the engine can tell which business is yours. A business with three phone numbers online looks like three businesses, or none.

Reviews in your customers' words

Answer engines read what reviews say, not just the stars. "They fixed our AC the same afternoon" is something an assistant can repeat when it describes you. A row of five stars with no words isn't. Reviews also decide whether people act on the recommendation: BrightLocal found 97% of consumers read reviews for local businesses, and 47% won't use a business with fewer than 20.

Pages they can read

Fast pages, open to the crawlers answer engines send, with structured data: a few lines of code that spell out who you are, what you do and where, matching what the page says. If a site blocks those crawlers, or keeps its words inside pictures, the engines have nothing to quote.

AEO and SEO: what's the difference?

SEO, search engine optimization, gets your pages ranked in Google's list of results and on Google Maps. AEO gets your business named inside the answer itself. They share the same foundations: a fast site, clear pages, structured data and a complete Google Business Profile. AEO adds the things answer engines lean on more: mentions on other sites, listings that agree everywhere, reviews with real words in them and pages written to be quoted.

In practice, good SEO is the floor for AEO. Google's AI answers draw on Google's own index, and ChatGPT's search draws on providers like Bing. If search engines can't find you, answer engines can't either.

Where to start

1. Ask them yourself. Ask ChatGPT, Perplexity and Google's AI Mode the questions your customers ask, like "best roofer in Clearwater" or "who builds custom websites in Tampa". Write down who they name and which sites they quote. That's your starting line.
2. Let the crawlers in. Make sure your site doesn't block the crawlers that Google, OpenAI, Perplexity and Anthropic send. Some website settings and security tools block them without anyone noticing.
3. Get into Bing. Add your site to Bing Webmaster Tools and submit your sitemap. Bing is one of the providers behind ChatGPT's search, and Bing's free AI Performance report shows you when Microsoft Copilot cites your pages.
4. Make your details agree. The same name, phone, hours, service area and website on your Google Business Profile, Bing Places, Apple Business Connect, Yelp and every directory you're listed in.
5. Answer real questions on your site. Put the answer in the first lines of the page, then the detail. A clear FAQ, marked up with structured data, gives engines short answers they can quote.
6. Earn reviews and mentions. Ask happy customers for reviews in their own words. Get mentioned where your customers already look: local news, industry directories, podcasts and YouTube.
7. Check every month. Ask the same questions again and watch who gets named. Bing's AI Performance report and Google Search Console's generative AI report show some of it for you. Answers change, so like SEO, this is ongoing work.

What AEO can't promise

Nobody controls what an answer engine says. Answers change from one day to the next, and two people asking the same question can get different names. BrightLocal found the same local search, asked again, named mostly different businesses: the lists overlapped by only 20 to 33%. Anyone who guarantees that ChatGPT will recommend you is guessing.

What AEO can do is make your business the clearest, best documented answer to the questions your customers ask, and show you, month by month, whether the engines are naming you.

One more thing you may hear about: llms.txt, a summary file for answer engines. It's cheap to add, and we keep one, but don't expect much from it. Google says its Search and AI features don't use it, and an SE Ranking study of nearly 300,000 sites found no link between having one and being cited.

Sources

1. OpenAI, DevDay 2026 recap, September 29, 2026.
2. Google, Google I/O 2026 opening keynote, May 19, 2026.
3. Pew Research Center, Google users are less likely to click on links when an AI summary appears in the results, July 22, 2025.
4. Ahrefs, Update: AI Overviews Reduce Clicks by 58%, February 4, 2026.
5. Seer Interactive, AIO Impact on Google CTR: 2026 Update, April 2026.
6. Ahrefs, Does AI Search Traffic Convert Better Than Traditional Search?, June 16, 2025.
7. Semrush, We Studied the Impact of AI Search on SEO Traffic, July 2025.
8. BrightLocal, Local Consumer Review Survey 2026, February 2026, updated September 2026.
9. BrightLocal, Local AI visibility study, September 16, 2026.
10. Google Search Central, AI features and your website, December 2025.
11. OpenAI Help Center, ChatGPT search.
12. Anthropic Trust Center, Subprocessors.
13. Perplexity, Introducing the Perplexity Search API, September 2025.
14. Ahrefs, An Analysis of AI Overview Brand Visibility Factors (75K Brands Studied), May 26, 2025.
15. Ahrefs, Top Brand Visibility Factors in ChatGPT, AI Mode, and AI Overviews, December 12, 2025.
16. Aggarwal and others, GEO: Generative Engine Optimization, KDD 2024.
17. Google Search Central, Optimizing your website for generative AI features on Google Search, July 2026.
18. SE Ranking, LLMs.txt: Why Brands Rely On It and Why It Doesn't Work, November 7, 2025.

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