SEO vs GEO vs AEO — three disciplines, one engine strategy

Most agencies still sell SEO as if Google's ten blue links are the whole game. They are not. High-intent discovery now happens inside Google AI Overviews, Perplexity Direct Answers, ChatGPT Browse, and Bing Copilot — surfaces that reward a different kind of engineering.

LuminaForge treats SEO, Generative Engine Optimization (GEO), and Answer Engine Optimization (AEO) as three layers of one system — not three unrelated line items.

SEO: rank in Google's index

Search Engine Optimization is the foundation. It covers crawlability, indexation, technical health, page speed, internal linking, and keyword-targeted content that earns positions in traditional search results.

If your site is slow, poorly structured, or missing canonical signals, nothing upstream works.

What SEO optimizes for

• Blue-link rankings on Google and Bing
• Featured snippets and People Also Ask boxes
• Local pack visibility (when relevant)
• Branded query ownership

GEO: get cited by AI assistants

Generative Engine Optimization is the infrastructure layer that makes your site legible to large language models — ChatGPT, Perplexity, Grok, Claude, and Google's AI training crawlers.

GEO does not replace SEO. It extends it with five pieces most sites skip:

1. llms.txt and llms-full.txt at the domain root
2. Explicit AI crawler allow-list in robots.txt
3. Entity-rich copy that spells out who you are without pronouns
4. Comprehensive JSON-LD (Organization, Service, FAQPage, Article)
5. Public citation tracking so you can measure LLM presence weekly

AEO: win inside the generated answer

Answer Engine Optimization is the content layer. It maps conversational queries to answer-ready pages, writes FAQ sections the way users actually ask AI assistants, and structures statistics so models can lift them cleanly into a response.

Where GEO wires the pipes, AEO fills them with quotable answers.

AEO targets

• Google AI Overviews
• Perplexity Direct Answers
• ChatGPT Browse citations
• Bing Copilot summaries

How the three fit together

Layer	Primary question	Key deliverables
SEO	Can Google find and rank this page?	Technical audit, content strategy, Core Web Vitals
GEO	Will LLMs cite this domain as a source?	llms.txt, crawler permissions, entity schema
AEO	Will AI answer engines quote this brand?	Conversational FAQ, query mapping, citable stats

What to ship first

1. Fix performance and crawlability — SEO baseline
2. Deploy llms.txt + AI crawler allow-list — GEO infrastructure
3. Add FAQPage schema on every meaningful page — AEO content layer
4. Stand up a query bank and weekly citation log — measurement

LuminaForge ships all four in the first month of every engagement. See our services or book a strategy call when you want the full audit.