GEO guides

What is generative engine optimization? A plain English guide

People now ask AI assistants the questions they used to type into Google. Generative engine optimization is how you make sure your website is easy for those assistants to find, read and quote.

By Geolytic team · 2 November 2026 · 6 min read

The short answer

Generative engine optimization, usually shortened to GEO, is the work of making your website a clear and trustworthy source for AI systems that write answers. Think of ChatGPT search, Google AI Overviews, Gemini, Claude or Perplexity. Instead of showing ten blue links, these tools read several pages and write one answer. GEO is about being one of the pages they read and one of the sources they mention.

The term became popular after a 2023 research paper from a group of university researchers titled GEO: Generative Engine Optimization. They tested how changes to page content affected whether a page showed up inside AI written answers. Since then the phrase has moved from academic papers into everyday marketing conversations.

Why GEO matters now

Search behaviour is changing. Someone looking for an accountant, a project management tool or a dentist may never see a results page. They ask a question, read a short answer and maybe click one or two cited links. If your business is not in that answer, you are invisible for that moment.

This does not mean classic search is dead. Google still sends huge amounts of traffic and AI answers often lean on the same web pages that rank well. What it does mean is that being technically crawlable and clearly written now pays off twice. Once in normal search results and again in AI generated answers.

How AI answers choose their sources

No AI company publishes a full recipe for how sources are picked. What we do know comes from public documentation about their crawlers and search features plus what anyone can observe by testing. A few patterns are consistent:

The assistant has to be able to fetch your page. If your robots.txt blocks its search crawler, it cannot read you live.
The page has to say something specific. Vague marketing copy gives a model nothing to quote.
The facts need to be easy to extract. Clear headings, short answers near the top and structured data all help.
Your business identity should be consistent. When your name, services and location match across your site, a model is less likely to mix you up with someone else.

Notice that almost everything on that list is under your control. You cannot force an AI to recommend you, but you can remove the reasons it might skip you.

What GEO looks like in practice

1. Let the right crawlers in

Each AI company runs its own crawlers. OpenAI uses OAI-SearchBot for ChatGPT search and GPTBot for collecting training data. Anthropic runs Claude-SearchBot for search and ClaudeBot for training. Perplexity uses PerplexityBot. Google uses the Google-Extended token to let you opt out of Gemini training without leaving Google Search. You can allow search crawlers while still blocking training crawlers if you prefer. Our AI crawler guide walks through each one.

2. Write answers, not slogans

Look at your most important pages and ask a simple question. Could someone copy one paragraph from this page and use it to explain what we do, who we serve and what it costs? If the answer is no, rewrite the opening so that it can. Put the direct answer first then add detail underneath.

3. Add structured data

Schema.org markup in JSON-LD format tells machines what a page is about in a predictable shape. Organization, WebSite, Product, Article and LocalBusiness are good starting points. Only mark up facts that are true and visible on the page. Invented reviews or prices can do more harm than good.

4. Keep your technical SEO healthy

GEO sits on top of technical SEO. Broken pages, missing titles, slow loading or pages hidden behind JavaScript that never renders for crawlers hurt you in both worlds. A regular technical SEO audit catches these problems early.

5. Make your brand easy to recognise

Use the same business name everywhere. Explain clearly what you offer on your homepage. Include contact details and an about page that a stranger could read in one minute and understand. These are small things but they reduce the chance that an AI confuses you with a similarly named company.

What GEO cannot promise

Be careful with anyone who guarantees AI rankings. AI answers change from one question to the next, from one user to another and from week to week. There is no public ranking position to report the way there is in Google. Honest GEO work focuses on readiness signals you can measure on your own site and on repeated checks of real AI answers over time.

Some agencies also promote files like llms.txt as a magic switch. It can be a tidy summary of your site, but no major AI provider has publicly confirmed that it reads one. We explain the details in our llms.txt guide.

GEO and SEO are partners

A lot of people ask whether GEO replaces SEO. It does not. Most GEO improvements are good SEO habits with extra attention on clarity and machine readability. If you want the full comparison, read GEO vs SEO: what actually changes.

How agencies can package GEO for clients

If you run a small SEO or digital agency, GEO is less a new service and more a sharper way to explain work you already do. Clients have heard of ChatGPT. They have not heard of crawl budgets or canonical tags. Framing your technical fixes around whether AI assistants can read and describe the business makes the value easier to see.

Start with a baseline audit

Before you promise anything, measure. Record which AI crawlers the client allows, which key pages lack structured data, which pages open with vague copy and whether the business name is consistent across the site. Save the evidence with dates so you can show progress later. A free GEO audit gives you this baseline with the affected page for every finding.

Sell outcomes you control

Promise readiness work, not AI rankings. A good scope sounds like this: we will make sure AI search crawlers can reach your site, add accurate structured data to your ten most important pages, rewrite their opening paragraphs so they answer real customer questions and fix the technical errors that block crawling. Every item is measurable and none depends on a model you do not control.

A simple three tier offer

One off GEO readiness audit with a written action plan. Good as an entry offer for new clients.
Fix sprint over four to six weeks covering crawler access, structured data and copy on priority pages.
Monthly retainer with rescans, a short progress report and new content aimed at buyer questions.

Price each tier around your normal hourly rate and the size of the site. Keep the first tier small enough that a client can say yes without a long approval process.

Report in plain language

Clients do not need a list of two hundred warnings. Group findings into three buckets: blocking problems, quick wins and longer improvements. For each item explain the business effect in one sentence. Attach the evidence so nobody has to take your word for it. Branded PDF reports help here because the deliverable looks like your work, not a tool export.

Where to start this week

Check your robots.txt to see which AI crawlers you currently allow or block.
Rewrite the first paragraph of your homepage so it answers what you do and for whom.
Add Organization and WebSite structured data if you do not have it.
Fix any broken links, missing titles or missing meta descriptions on key pages.
Ask a few AI assistants the questions your customers ask and note whether you appear.

If you would rather see all of this in one place, run a free GEO audit. Geolytic crawls your site, checks AI crawler access, structured data, entity clarity and content clarity, then shows every finding with the page where it was found. Anything it cannot measure is marked as not measured instead of guessed.