GEO vs SEO vs AEO: what a small business actually needs

GEO vs SEO vs AEO: the short answer

If you own a local business and keep seeing three acronyms in marketing emails, here is the plain version.

• SEO (search engine optimization) is making your site easy for search engines to find, read and rank.
• GEO (generative engine optimization) is getting your content used and cited inside answers written by AI tools such as ChatGPT, Perplexity and Google’s AI features.
• AEO (answer engine optimization) is being the direct answer, whether that is a featured snippet, a voice reply or an AI answer.

The honest finding is that they overlap far more than the sellers of each one admit. Google, which runs the largest search engine, says that optimizing for generative AI search is optimizing for the search experience, which it calls SEO. That does not make the new terms useless. It means a small business should not buy three separate services. It needs one clean set of fundamentals, with a few additions for AI assistants. This article is part of our guide to AI search optimization.

SEO, GEO and AEO compared

The “where it comes from” row is the useful one. GEO was named and tested in an academic paper. The authors describe it as a way for content creators to improve visibility in AI-generated answers, and report that their methods can boost visibility by up to 40% on their own benchmark, with results that differ by domain. That is a lab result on a test set, not a promise for your plumbing company. AEO, per the Sanity glossary, grew out of direct-answer surfaces that predate ChatGPT, and that glossary notes there is no settled taxonomy separating AEO, GEO and similar labels.

What Google says about GEO and AEO

Google published its own guide on May 15, 2026, titled “Optimizing your website for generative AI features on Google Search” (last updated July 2026). Its main points:

• AI Overviews and AI Mode are rooted in Google’s core ranking and quality systems, so standard SEO still applies.
• Google treats AEO and GEO as SEO and advises measuring third-party AEO and GEO advice against its guidance.
• There are no additional requirements to appear in AI Overviews or AI Mode. Pages must be indexed and eligible to show with a snippet.
• Structured data is not required for generative AI search, and there is no special schema.org markup to add. Google still suggests using structured data for rich result eligibility.
• Google Search ignores llms.txt files, so creating one neither helps nor harms your Search visibility.
• You do not have to split content into small chunks or rewrite it for AI.
• Unique, first-hand content beats summaries that restate what exists elsewhere.
• Business Profiles and Merchant Center feeds can make products and services visible in AI responses.
• Meeting every requirement does not guarantee crawling, indexing or serving.

That is Google. ChatGPT, Perplexity and Bing’s Copilot are separate systems with separate crawlers, and each publishes less. OpenAI says to allow OAI-SearchBot in robots.txt to be eligible for ChatGPT search, that placement is not guaranteed, and that results can be incomplete, outdated or incorrect. We cannot assume Google’s rules describe ChatGPT. What we can see is that the basics are shared: crawlable pages, clear facts, and accurate profiles.

Where the terms do differ in practice

Not everything is the same. Three differences are real.

1. More than one engine. SEO work usually means Google first. AI answers come from several systems. Study results show how different they can be: in a 2026 study by Steady Demand of 1,487 local queries, Gemini and ChatGPT shared many of the same cited domains only 8% of the time. Check more than one assistant.
2. The answer may not send a click. In classic search, success is a visit. In an AI answer, the customer may only read your name, price or phone number. The facts must be right wherever they appear.
3. Results move between runs. In the same study, repeated Gemini searches named the same top business about 7% of the time, while Google’s local pack returned the same top listing about 90% of the time in a control test. One check is a snapshot, not a ranking. Plan to measure repeatedly.

None of these call for a different strategy. They change how you measure, and they raise the value of facts being consistent across your site and profiles.

What a small business actually needs

Here is the whole plan, in priority order. It is the same list whichever acronym you prefer.

1. Let the crawlers in. Allow Googlebot, Bingbot, OAI-SearchBot (ChatGPT search) and PerplexityBot in robots.txt, and make sure your host or firewall does not block them. OpenAI and Perplexity each say a robots.txt change can take about 24 hours to take effect.
2. One page per service, in text. What it is, who it is for, where you do it, what it costs or a typical range, how long it takes, how to book. Keep important content in plain text, not images or chat widgets.
3. Accurate profiles. Complete Google Business Profile, Bing Places for Business and the other directories your customers use. Same name, address, phone and hours everywhere. Google says complete, accurate profiles are more likely to appear in local results, and Microsoft tells local businesses to keep address, hours and contact details current in Bing Places.
4. Reviews and replies. Google says more reviews and positive ratings can help local ranking. We do not claim assistants weigh them the same way, but customers read them.
5. Structured data that matches the page. Optional for AI, but a clean way to state facts. See schema markup for local businesses.
6. Freshness. Date your service and price pages, and update them. Microsoft’s publisher advice includes updating content regularly so AI systems reference the current version.
7. Measure. Ask the same 10 customer questions in ChatGPT, Google, Perplexity and Copilot every month and write down what each says about you. Use Search Console’s generative AI report and Bing Webmaster Tools’ AI Performance report as samples, not rankings. Our step-by-step plan is in how to show up in ChatGPT.

For businesses with several towns or service areas, the local part is where most of the work sits. See local SEO and AI search visibility in Boston for an example of how we handle it.

What a small business can skip

• Buying separate GEO, AEO and SEO packages. The work overlaps. Ask any vendor which tasks are different and why.
• Chasing an “AI score.” Google says no third-party tool has access to its internal metrics, so be wary of tools that claim to show exact AI rankings.
• llms.txt as a priority. Google says its Search does not use it. We know of no measured effect on other assistants. See llms.txt for what it is.
• Mass-produced pages for every phrase variation. Google warns this can violate its scaled content abuse policy.
• Fake mentions and reviews. Google says inauthentic mentions do not help.
• Panic about “SEO is dead.” The facts say otherwise: Google’s AI features pull from its search index. Our article on whether SEO is dead covers what is changing.

Which one should you start with?

Start with SEO fundamentals, because every AI answer needs something to read, and a page that is not indexed cannot be cited by Google’s AI features. Then add the AI-specific habits: allow OAI-SearchBot, state facts plainly, and test the main assistants on a schedule.

If you already have a decent site and want to see what is in the way, a written audit is the shortest path. Our GEO/AEO audit is from $750 and takes 1-2 weeks. It covers the page map, a service page template, missing information, schema, listings and a record of what AI answers say about you now, with a re-check after the fixes. If you do not have a site that can carry this, a new one built for it is the first step: see web design in Boston. To see where you stand before spending anything, ask for a free demo.

Published October 25, 2026. Updated October 25, 2026.