SEO vs AEO vs GEO: What's the Difference and Do You Need All Three?

Search engine optimisation makes pages discoverable, understandable and trustworthy so they rank in search results. Google's starter guide covers the basics: crawlable pages, descriptive titles, helpful content, sensible site structure, and links from other sites. It remains the foundation for everything else.

Answer engine optimisation targets places where a search returns an answer rather than a list: featured snippets, 'People also ask' boxes, voice assistants and knowledge panels. Google selects featured snippets from pages that directly answer the query, so AEO focuses on question-led headings, concise answers and well-structured lists and tables.

Generative engine optimisation targets AI systems that write answers — Google AI Overviews and AI Mode, ChatGPT search, Perplexity, Claude. The term comes from a 2023 research paper that found adding citations, statistics and quotations made content more visible in AI-generated responses. GEO also emphasises crawler access and consistent information about your brand across the web.

All three reward the same core qualities. Google states that the SEO best practices that work for Search also apply to its AI features. What changes is emphasis, not direction.

Start with technical SEO so everything can be crawled and indexed. Research the questions your customers ask. Write pages that answer each question directly, then support the answer with detail, examples and sources. Add structured data that describes your business and content. Keep your details consistent across Google Business Profile and directories. Measure search traffic, snippet visibility and AI referrals together.

Take the question 'how much does a website redesign cost in India'. In classic search, the goal is for your page to rank on the first page. For AEO, the goal is for your concise answer to appear in the featured snippet or 'People also ask' box. For GEO, the goal is for an AI Overview, ChatGPT or Perplexity to cite your page when it writes its answer.

One well-built page can achieve all three: a clear title and helpful content (SEO), a direct two-sentence answer under a matching heading (AEO), and specific cost factors, examples and sources that an AI system can quote (GEO).

For most small and mid-sized businesses, the majority of effort belongs to SEO fundamentals and content, because they power all three. Structuring content for answers adds little extra cost once pages are being written anyway. GEO-specific work — crawler access, entity consistency, evidence and sources — is mostly a set of habits rather than a separate project.

SEO leans on technical skills — crawling, indexing, site architecture, performance — alongside content and link building. AEO leans on editorial skills: understanding the exact question behind a query and answering it concisely in the right format. GEO adds research and evidence skills — sourcing facts, citing them properly — plus brand consistency across the wider web. One person or team can cover all three; what matters is that each skill is present.

Month one: fix technical SEO issues, confirm crawler access in robots.txt, and add Organization and LocalBusiness structured data. Month two: research the top customer questions and restructure your most important service pages with direct answers, evidence and FAQs. Month three: publish in-depth guides on the questions people ask most, keep business listings consistent, and start tracking search, snippet and AI referral results together.

Be wary of anyone selling SEO, AEO and GEO as three unrelated packages, or promising guaranteed AI citations or top rankings — nobody controls those. A good provider starts with a technical audit and your customers' real questions, explains what they'll change on your pages and why, and reports on outcomes you care about: enquiries, calls and sales from search and AI referrals.

Treat SEO, AEO and GEO as one discipline with three kinds of result. Build crawlable, fast pages; answer real questions directly; back claims with evidence; and keep your business information consistent everywhere.

Start with a technical SEO audit and a list of your customers' top ten questions. Those two documents drive almost everything else in all three disciplines.

If your site has technical problems or thin content, fix SEO first — AEO and GEO can't work on pages that aren't indexed. If the basics are solid, restructuring your most important pages around clear questions and answers usually improves all three at once.