SEO vs GEO vs AEO: what actually differs.
Three acronyms, one overlapping toolkit, and a lot of confused marketing. Here is the honest version - what each discipline optimizes for, where they share work, and the checklist we run on every client site.
The short version
SEO (Search Engine Optimization) optimizes your site to rank in the classic results list - Google, Bing, and their maps and image tabs. The game is crawlability, relevance, and authority, and it has decades of settled mechanics.
AEO (Answer Engine Optimization) targets the answer surfaces that grew out of search: featured snippets, "People also ask" boxes, and voice assistants. The unit of work is a question and a concise, extractable answer.
GEO (Generative Engine Optimization) is the newest layer: being cited inside AI-generated answers - Google AI Overviews, ChatGPT with browsing, Perplexity, Copilot. The term entered the vocabulary with academic work on generative engines (the Princeton-led GEO paper presented at KDD 2024), which measured what actually changes an AI answer's sourcing. Its finding that matters most to a small business: adding citations, quotations, and statistics to content measurably increased its visibility in generated answers.
Here is the part most agencies skip: you cannot do any one of the three in isolation. AI assistants read the same web that Google ranks. A site with strong SEO foundations and honest, structured answers tends to win all three surfaces; a site chasing only "AI visibility" with thin content tends to win none of them.
Same web, three different podiums.
| Dimension | SEO | AEO | GEO |
|---|---|---|---|
| Where you appear | Ranked results list | Snippets, PAA, voice | Inside AI-written answers |
| Core unit | The page | The question + answer | The claim + its source |
| What earns the spot | Crawl, relevance, links, behavior | Concise extractable answers | Quotable specifics, credibility |
| Measurement | Rankings, Search Console clicks | Impressions on answer surfaces | Citation monitoring in AI tools |
| Timeline | Months, compounding | Weeks for technical wins | Emerging, less predictable |
← Swipe horizontally to see full table →
What actually gets a source cited by AI.
From our client work and the published research, these are the levers that move.
Quotable sentences
Generative engines lift text close to verbatim. Write the definitional sentence you would want lifted: short, self-contained, no fluff around the fact.
Numbers with sources
Concrete figures outperform adjectives. State the number, its unit, and where it came from - vague claims give an AI nothing to anchor on.
Entity consistency
Same business name, address, and facts everywhere - your site, directories, profiles. AI engines reconcile entities across sources before trusting one.
Real answers to real questions
An FAQ that answers what buyers actually ask becomes citation fuel. An FAQ of softball marketing questions gets ignored by humans and machines alike.
Being present where engines read
Citations skew toward sources that are already visible: established pages, structured data, and third-party corroboration. Absence from the readable web is the hardest gap to fix.
Speed and structure
Fast, clean HTML with schema helps every engine parse you. It will not alone win a citation - but it removes the reasons to skip you.
One pass, all three surfaces.
- Fix crawlability: sitemap, robots, canonicals that match served URLs, no redirect chains on internal links.
- Fix speed: 95+ PageSpeed mobile. Slow pages lose rankings and reduce AI crawl depth alike.
- Structure content as answers: each page leads with a direct answer to its core question, then the detail.
- Add schema honestly: Organization, Service, BreadcrumbList, FAQPage - matching visible content, never invisible text.
- Add quotable specifics: prices or ranges, timelines, named tools, measured outcomes with sources.
- Unify entity data: identical name, address, phone across your site, Google profile, and directories.
- Build corroborating mentions: profiles, listings, and guest content that independently state what you do.
- Monitor citations: periodically ask the major AI assistants your buyer questions and record who gets cited. That is your GEO rank tracker.
Common questions
Keep researching
What a small business website really costs.
Crawlable, fast infrastructure is the foundation every discipline shares. What it should cost in 2026.
Read the cost guide →The hidden costs of SaaS.
Answer engines can only cite what they can crawl: the case for infrastructure you own.
Read the breakdown →Everything else lives in Insights.