AI Search · Glossary
18 August 2026 7 min read By Online By Digital

SEO, AEO and GEO all aim to get a business found online, but they target different systems: SEO optimises for classic ranked search results, AEO optimises for direct-answer features like Google AI Overviews, and GEO optimises for generative AI chat tools like ChatGPT, Perplexity and Claude. The good news is they aren't three separate projects — the same structured, verifiable, well-written website underpins all three. This guide untangles exactly what each acronym means and how much weight to put behind each one.

Quick answer: SEO = ranking in traditional search links. AEO = being selected as a direct answer (including Google AI Overviews). GEO = being cited by generative AI chat tools (ChatGPT, Perplexity, Claude). One strong, structured website underpins all three. We handle all three together — call 072 217 7047.

SEO — Search Engine Optimisation

SEO is the original discipline: getting a webpage to rank as high as possible in the traditional list of search results on Google, Bing and similar engines. It's built on keyword relevance, page speed, mobile-friendliness, backlinks and content quality. SEO remains the foundation everything else is built on — a slow, poorly structured, thin-content site will struggle at AEO and GEO too, regardless of how much schema is bolted on.

AEO — Answer Engine Optimisation

AEO optimises specifically for being selected as the answer, rather than one of ten links. This covers Google's featured snippets, voice assistant answers (Siri, Google Assistant) and — increasingly the biggest prize — Google's AI Overviews (formerly SGE). AEO leans heavily on structured schema markup, direct declarative answers near the top of a page, and FAQ-formatted content that's easy for an answer engine to lift and quote directly. Read more in What Is Google SGE (AI Overviews)?

GEO — Generative Engine Optimisation

GEO is the newest of the three, aimed specifically at generative AI chat tools — ChatGPT, Perplexity, Claude and similar — that synthesise answers from multiple sources and sometimes cite them. GEO overlaps heavily with AEO (both reward structured, verifiable, citable content) but is distinct in that these tools often combine live browsing with periodic training data, so consistent, long-standing topical authority matters as much as any single well-optimised page.

Side-by-Side Comparison

SEOAEOGEO
TargetsGoogle, Bing ranked resultsFeatured snippets, voice, AI OverviewsChatGPT, Perplexity, Claude
Main leversKeywords, backlinks, speedSchema, direct answers, FAQsStructured data, citability, topical depth
Win conditionRank in top 10 resultsBe the quoted/cited answerBe named/cited in a chat response
MaturityEstablished, ~25 yearsGrowing fast since 2023Emerging, 2023 onward

Do You Need All Three?

In practice, yes — but not as three separate projects. The foundations overlap so heavily that a single, well-executed strategy covers all three simultaneously:

  • Solid technical SEO (speed, mobile-friendliness, clean structure) is the floor every discipline needs.
  • Structured schema markup (Article, FAQPage, LocalBusiness, BreadcrumbList) is the single biggest lever shared by AEO and GEO.
  • Direct, declarative content written to answer real questions in the opening paragraph benefits SEO, AEO and GEO all at once.
  • Verifiable trust signals — genuine, checkable reviews and consistent business information — matter increasingly across all three as AI systems get better at distinguishing real signals from claimed ones.

For a practical walk-through of implementing these, see How to Get Your Business Mentioned in ChatGPT, Perplexity and Google AI Overviews.

Why This Matters More for South African Businesses Right Now

Competition for classic SEO in South Africa is intense — most established businesses have had a decade or more to build up backlinks and content. AEO and GEO are comparatively wide open: far fewer local competitors have added proper schema markup or written genuinely direct-answer content. That gap is temporary — it will close as more businesses catch on — which makes now the highest-leverage moment to act.

Want SEO, AEO and GEO handled as one strategy, not three separate invoices? Online By Digital's AI SEO / AEO / SGE service builds the shared foundation once — schema, direct answers, trust signals — so it works across all three simultaneously. See the service or get in touch.

What Does It Cost?

Because SEO, AEO and GEO share the same underlying foundation, Online By Digital delivers all three through a single monthly retainer rather than separate line items for each acronym:

ServiceIncludesPrice
AI SEO / SGE / GEO — Monthly ServiceSchema audit & implementation, direct-answer content restructuring, FAQ schema, E-E-A-T & NLP optimisation, monthly AI-visibility reportingFrom R5,500 / month

Prefer a full custom website alongside it? See Web Design Pricing for once-off build packages from R5,500.

Frequently Asked Questions

SEO (Search Engine Optimisation) improves ranking in traditional search result links. AEO (Answer Engine Optimisation) improves how likely a page is to be selected as a direct answer, including in Google AI Overviews. GEO (Generative Engine Optimisation) improves how likely a page is to be cited by generative AI tools like ChatGPT, Perplexity and Claude. They overlap heavily but target slightly different systems.
They're closely related but not identical. AEO usually targets direct-answer features like Google AI Overviews and voice assistants. GEO more specifically targets generative AI chat tools such as ChatGPT, Perplexity and Claude. In practice, the same technical work — schema markup, direct answers, verifiable trust signals — improves both.
No — the underlying foundations overlap substantially. A well-structured, fast, schema-rich, genuinely useful website with verifiable trust signals performs well across classic SEO, AEO and GEO simultaneously. What changes between them is emphasis, not the core work.
All three matter, but AEO and GEO are currently the bigger opportunity because far fewer competitors have optimised for them yet. Classic SEO remains the foundation, but adding structured schema and direct-answer content on top of it can gain outsized visibility in AI Overviews and AI chat tools.
In this context, GEO stands for Generative Engine Optimisation — optimising a website so that generative AI tools like ChatGPT, Perplexity and Claude are more likely to cite it when producing an AI-written answer. It should not be confused with geographic/location targeting, which is also sometimes abbreviated GEO in other marketing contexts.