INSIGHTS — 05 · GEO BASICS
Generative Engine Optimization (GEO) explained: GEO vs SEO vs AEO
Two years ago a buyer typed “commercial roofing contractor Calgary” into Google and got ten links. Today the same buyer asks Google’s AI, or ChatGPT, the same question in a full sentence and gets one answer with three company names in it. Either you are one of the three or you are not in the conversation. Generative engine optimization is the discipline of being one of the three.
This article explains what the term means, how it relates to SEO and the other names you will see, what genuinely changed, and what did not.
One discipline, five names
The field is young enough that the vocabulary has not settled. You will meet all of these, and they describe the same work:
| Term | Where you see it | Emphasis |
|---|---|---|
| Generative engine optimization (GEO) | The 2023 research paper that named the field; most technical writing | Being cited by generative engines |
| Answer engine optimization (AEO) | Agency marketing, SaaS tools | Being the answer, including featured snippets and voice assistants |
| AI search optimization | Business press, job titles | Search products with AI answers on top (AI Overviews, AI Mode, ChatGPT search) |
| AI SEO | Practitioners coming from classic SEO | SEO extended to AI surfaces |
| AI visibility | Monitoring tools, audits | The measurement side: are you mentioned, are you cited, how often |
If you are a business owner, ignore the labels and hold on to the outcome: when a buyer asks an AI engine who to hire, your company is named and your website is the source it points to.
What GEO actually is
An AI engine answering a buying question does three things in sequence. It runs a search against a web index, reads a handful of the pages it finds, and writes one answer that names the businesses those pages support, usually with citations. GEO is the work of winning each of those three steps:
- Be in the index and be retrievable for the question and its sub-questions. This is the part that overlaps with SEO.
- Be readable and quotable. The engine reads your page the way a hurried researcher would. Plain claims, real facts, numbers, tables and clear headings get lifted into answers. Marketing copy, text rendered only by JavaScript and PDF brochures do not.
- Be consistent as an entity. The engine cross-checks you against other sources: your business profile, directories, news mentions, social pages. If your name, location and services agree everywhere, it recommends you with confidence. If they do not, it hedges or picks someone else.
Everything in a serious GEO program maps back to one of those three steps.
GEO vs SEO vs AEO, side by side
| SEO | GEO | AEO | |
|---|---|---|---|
| Goal | Rank on the results page | Be cited inside the generated answer | Be the answer (snippets, voice, AI) |
| Unit of success | Position and clicks | Citation and mention share across real questions | Answer ownership |
| Where it shows | Ten blue links | AI Overviews, AI Mode, Gemini, ChatGPT, Copilot, Perplexity | Featured snippets, assistants, AI answers |
| What you optimize | Keywords, links, page speed, structure | Crawler access, answer-shaped content, entity consistency, third-party mentions | Direct question-and-answer content |
| How it is measured | Rank trackers, Search Console | Sampling real questions across engines | Snippet and answer tracking |
| Feedback loop | Days to weeks | Weeks (search-backed engines) to model generations (memory) | Days to weeks |
The honest summary: SEO is the foundation, GEO is the building, and AEO is a different name for most of the same building.
What changed
The unit of success. Ranking third used to be fine; third place still earned a share of the clicks. In a generated answer there is no third place. Either your site is among the two to eight sources the engine used, or it is invisible for that question.
Two indexes now matter, not one. Google’s AI products (AI Overviews, AI Mode, Gemini) draw on Google’s index. ChatGPT’s web search and Microsoft Copilot draw on Bing’s. A site that never bothered with Bing Webmaster Tools is now missing from half the AI surfaces.
Machine readability is no longer optional. Engines cite what they can parse. A site whose content only appears after JavaScript runs, or whose product specifications live in PDF catalogues, is effectively blank to them. The same goes for sites that block AI crawlers at the firewall, often without knowing it.
Third parties carry more weight. In our own sampling, industry associations, local news and directories are cited at least as often as company websites for the same buyer questions. Engines trust a claim more when someone other than you makes it.
Questions replaced keywords. People type full sentences to an AI. “Which supplier stocks stainless fasteners in Alberta and ships the same day” is a real query now. Content has to answer questions like that directly, not target a two-word phrase.
What did not change
Crawlability and indexing. If Googlebot cannot fetch the page, Gemini cannot cite it. robots.txt, sitemaps, canonical tags and response codes matter exactly as much as before, plus a few new lines to welcome AI crawlers by name.
Organic ranking still feeds the answer. Google’s AI Overviews draw their sources largely from pages that already rank well for the question or its sub-questions. In our measurements the cited pages are almost always ones sitting near the top of the ordinary results. Ranking did not stop mattering; it became the entry ticket.
Authority is still earned outside your own site. Links were the currency of SEO. Mentions, citations and consistent business listings are the currency of GEO. It is the same principle, measured differently.
Real content still wins. Pricing ranges, delivery areas, specifications, timelines and comparisons are what engines lift into answers. That was also what good SEO content looked like.
What moves the needle, in order
- Let the engines in. Allow GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot and Google-Extended in robots.txt, and confirm your host or CDN actually returns a 200 to them. A surprising number of sites block AI crawlers through a default firewall setting.
- Make every important fact readable without JavaScript. Services, service area, prices or price ranges, certifications, contact details, in HTML text, with structured data (Organization or LocalBusiness, Service, FAQPage) that says the same thing.
- Answer the questions buyers actually ask. One page per real question: what it costs in your region, how delivery works, A versus B for your climate or use case. Lead with the answer, then the detail.
- Fix your entity. Google Business Profile, Bing Places, the main directories in your industry, and your social pages should all carry the same name, address, phone, service area and description. List every spelling of your brand in your structured data so engines can connect them.
- Get mentioned by others. Association member pages, local press, supplier and partner sites, chamber of commerce listings. One good third-party page can be worth more than three new pages of your own.
- Measure with real questions. Pick fifteen to twenty questions a buyer would ask, put them to the engines monthly, and record cited versus mentioned versus absent. Watch the trend, not any single answer.
A note on measurement honesty
Generated answers vary. Ask the same question twice and the citations can differ. Any GEO claim built on a single answer is anecdote. Trends require repeated sampling with the same question set, the same engines and pinned model versions, and results should be reported as dated snapshots, with failed calls marked as unverified rather than counted as misses.
We hold our own reporting to the same standard: every number is one data point on one date, and it says so on the page.
Where to start
If you want to know where you stand, the fastest path is a measured baseline: twenty real buyer questions across Gemini and ChatGPT, with the sources they cite instead of you. We run that as a free audit and send back a PDF within two business days.
Questions people ask
What does GEO stand for in marketing?
Generative engine optimization: making a business visible, accurate and recommended inside AI-generated answers from ChatGPT, Gemini, Google AI Overviews and similar engines. It is unrelated to geo-targeting or location marketing, despite the shared abbreviation.
Is GEO the same as AEO?
In practice, yes. Answer engine optimization (AEO), AI search optimization, AI SEO and AI visibility all describe the same work from slightly different angles. GEO is the term used in the academic paper that named the field; AEO is more common in agency marketing. The techniques overlap almost completely.
Do I still need SEO if I do GEO?
Yes. AI engines build their answers from web indexes, mostly Google’s and Bing’s. A page that cannot be crawled or does not rank for the question or its sub-questions is rarely cited. Technical SEO is the floor; GEO is what you build on it.
How do you measure GEO?
By asking the engines real buyer questions and recording whether your site is cited as a source, whether your brand is merely mentioned, or neither, and who was cited instead. Results are a dated snapshot and vary between runs, so trends are read over repeated samples, not single answers.
( WHERE YOU STAND )
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