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In short: SEO vs AEO vs GEO comes down to where and how your content reaches people. SEO (search engine optimisation) helps a page rank in Google’s classic results and earn clicks; AEO (answer engine optimisation) helps your content become the direct answer in featured snippets, voice assistants and AI Overviews; GEO (generative engine optimisation) helps your business get mentioned and cited in answers from ChatGPT, Perplexity, Gemini and Copilot. All three rest on the same foundation: a crawlable, fast and clearly written website. A small business should start with SEO fundamentals and write content that can be quoted as an answer from day one.
When a marketer mentions SEO, AEO and GEO in one breath, the obvious question is: SEO vs AEO vs GEO – what is the difference, and does a small business now need three separate projects? The short answer is no, but you do need to understand what each term measures. This article gives clear definitions, a comparison table, the overlaps, what to do first on a small company website and how to measure AI visibility.
What is SEO?
SEO (Search Engine Optimisation) is optimising a website and its content so a page ranks as high as possible in a search engine’s classic results (in Estonia, overwhelmingly Google) and users click through. SEO has three parts: technical (indexing, speed, mobile, structure), content (keywords, pages that answer customer questions) and authority (links from other sites, Google Business Profile, reviews). Success is measured in rankings, impressions, clicks and leads.
What is AEO?
AEO (Answer Engine Optimisation) means writing and structuring content so a search engine or assistant can use it as the direct answer to a question. The term grew up with featured snippets, “People also ask” boxes and voice assistants, and now also covers Google’s AI Overviews. Typical AEO techniques are a heading phrased as a question, a 40–60 word answer right below it, lists and tables, an FAQ block and schema.org structured data. AEO success is not necessarily a click: often the goal is that users see your answer and your brand directly.
What is GEO?
GEO (Generative Engine Optimisation) is optimising for generative AI engines that compose an answer from several sources: ChatGPT, Perplexity, Gemini, Claude, Microsoft Copilot and Google’s AI Mode. The term was coined by researchers in the paper “GEO: Generative Engine Optimization”, published in November 2023 (KDD 2024). In their experiments, adding citations, quotations and statistics increased content visibility in AI answers by up to 40%. The goal of GEO is for AI to mention your brand, recommend your service and link to your page. Besides your own content, mentions elsewhere matter: directories, media, reviews and comparison articles. A hands-on guide is in our article on GEO optimisation.
SEO vs AEO vs GEO: comparison table
| Aspect | SEO | AEO | GEO |
|---|---|---|---|
| Goal | High ranking and a click to your site | Your content is the direct answer | AI mentions, recommends and cites your business |
| Where it shows | Classic Google and Bing results, maps | Featured snippets, “People also ask”, voice assistants, AI Overviews | ChatGPT, Perplexity, Gemini, Copilot, Google AI Mode |
| Success metric | Rankings, clicks, leads | Snippets won, impressions, citations in AI Overviews | Share of mentions and citations in AI answers, AI referral visits |
| Main tactics | Technical SEO, keywords, content, links, Google Business Profile | Question–answer structure, short answer first, FAQ, schema.org | Facts and figures with sources, comparison tables, brand mentions, access for AI crawlers |
| Is a click required? | Yes, it is the main goal | Not always | Not always; the recommendation and citation matter |
Where do SEO, AEO and GEO overlap?
They are not three separate disciplines but three layers on one foundation. Google states in its documentation that there are no additional requirements or special optimisations needed to appear in AI Overviews or AI Mode: the page must be indexed and eligible to show with a snippet, and normal SEO best practices apply. ChatGPT and Perplexity also search the web through search indexes, so a page search engines cannot find is unlikely to make it into an AI answer.
- Shared foundation. Indexing, speed, clear structure, unique and up-to-date content.
- AEO and GEO in common. Answer first, definitions, tables, FAQ, dates and author.
- Specific to GEO. Brand mentions beyond your own site and access for AI crawlers (robots.txt, Cloudflare settings).
The shift is real, though: in a 2025 Pew Research Center study, users clicked a classic result on 8% of visits when a Google AI summary appeared, versus 15% when it did not. Clicks alone therefore say less and less about your real visibility. We covered the strategic difference in AI visibility vs SEO.
What should a small business do first?
- Technical health. Check in Google Search Console that key pages are indexed, the site loads fast and works on mobile.
- Clear service pages. One page per service, stating what you do, for whom, where (city, region) and in which languages.
- Consistent business details. Name, address, phone and registry code identical on your site, Google Business Profile and directories; AI uses them to identify your company.
- Answer first. Add 2–4 sentences answering the main question on key pages, plus an FAQ with real customer questions.
- Structured data. Organization, LocalBusiness, FAQ and Article markup per schema.org.
- Open the site to AI crawlers. Make sure robots.txt or Cloudflare does not unintentionally block GPTBot, PerplexityBot and others; optionally add an llms.txt file (see what is llms.txt).
- Off-site mentions. Directory profiles, reviews and, where possible, mentions in industry articles.
Language matters in a multilingual market like Estonia: if customers search in Estonian, Russian and English, each language needs full-quality content, not machine translation. AI answers in the user’s language and prefers sources clearly written in that language.
How do you measure AI visibility?
| Method | What it shows | Cost |
|---|---|---|
| Google Search Console | Impressions and clicks; AI Overviews and AI Mode data is included in the “Web” search type, not shown separately | Free |
| Bing Webmaster Tools – AI Performance | How often your pages are cited in Microsoft Copilot and Bing AI summaries, and for which queries (public preview since February 2026) | Free |
| Google Analytics 4 | Visits referred by chatgpt.com, perplexity.ai, gemini.google.com, copilot.microsoft.com | Free |
| Manual prompt testing | Whether AI mentions your business in 10–20 typical questions (“best … in Tallinn”) | Free, takes time |
| AI visibility tracking tools | Share of mentions, competitors and cited sources across several AI engines, on a schedule | Paid, depends on tool and volume |
Good practice is to fix a list of questions and check it monthly in the same AI engines, because answers vary. The trend matters more than any single result. Concrete technical steps are in our AI visibility checklist.
How can IT Solutions Group help?
We do SEO, local SEO and AI search visibility (GEO) in Estonian, Russian and English, and have delivered more than 100 web projects since 2016. We start with an audit of whether your site is indexed, open to AI crawlers and currently mentioned by AI for your key questions, then fix technical issues, content and structured data in priority order. We do not promise guaranteed positions, but we measure results regularly. See our AI search visibility and SEO services.
Further reading: the practical GEO guide is GEO optimisation, the strategic comparison is AI visibility vs SEO, and the file for AI crawlers is explained in what is llms.txt.
Frequently asked questions
What is AEO in simple terms?
AEO is answer engine optimisation: writing and structuring content so a search engine or assistant can show it as a direct answer. Typical techniques are question headings, a short answer right after them, an FAQ and schema.org markup.
Does GEO replace SEO?
No. AI engines rely heavily on search indexes, so without a solid SEO foundation GEO results are hard to achieve. GEO adds brand mentions, fact-based content and AI crawler access on top of SEO.
What is the difference between AEO and GEO?
AEO aims for your content to be the single direct answer, for example in a featured snippet or AI Overview. GEO aims for generative AI to mention and recommend your business in an answer composed from many sources.
Does a small business need all three?
Yes, but not as three separate projects. Sound technical foundations, clear service pages, answer-first content and an FAQ serve SEO, AEO and GEO at the same time.
How can I tell whether ChatGPT mentions my business?
Write 10–20 questions your customers would ask and check the answers monthly in ChatGPT, Perplexity, Gemini and Copilot. Also track AI referral visits in Google Analytics and the AI Performance report in Bing Webmaster Tools.
Sources
- Google Search Central – AI features and your website (2025–2026)
- Aggarwal et al. – GEO: Generative Engine Optimization, arXiv / KDD 2024 (11.2023)
- Pew Research Center – Google users are less likely to click on links when an AI summary appears in the results (22.07.2025)
- Microsoft Bing Webmaster Blog – Introducing AI Performance in Bing Webmaster Tools Public Preview (02.2026)
- CXL – Answer Engine Optimization (AEO): The comprehensive guide for 2026 (2026)
