SEO gets pages ranked. AEO (answer engine optimization) gets content used as the direct answer in featured snippets, voice, and AI answer boxes. GEO (generative engine optimization) gets a brand cited or recommended inside ChatGPT, Perplexity, Gemini, and Google’s AI features. For agencies, they’re three layers of one service line: SEO is what you already sell, AEO is the natural upsell, and GEO is the new capability most clients will soon expect.

Why your clients are suddenly asking

Clients now see AI answers at the top of Google and hear that buyers ask ChatGPT for vendor shortlists. So the question lands on your desk: “What are we doing about AI search?” Agencies that can answer clearly keep the retainer and grow it. Agencies that can’t risk losing the account to someone who can.

The core difference

	SEO	AEO	GEO
Goal	Rank a page	Be the extracted answer	Be cited or recommended in AI responses
Where it shows	Organic results	Snippets, PAA, voice, AI answer boxes	ChatGPT, Perplexity, Gemini, AI Overviews, AI Mode
Unit that wins	The page	The passage	The brand plus the passage
Main signals	Relevance, links, technical health	Question-answer structure, schema	Topical depth, entity clarity, third-party mentions, consistency
Client KPI	Rankings, clicks	Answer ownership	Citation rate, share of AI voice

How they overlap

They’re layers, not replacements. AI systems retrieve from the web, so a client site that can’t be crawled won’t be cited. AEO structures content so machines can lift a clean answer. GEO asks whether the brand is known and corroborated enough that an AI recommends it over a competitor. A client can rank #3 and never be cited, or be recommended by ChatGPT with no page-one rankings.

What changes in delivery

Layer	Typical deliverables	Skills your team needs
SEO	Technical audits, on-page, content, links	What you already have
AEO	Answer-first rewrites, FAQ and schema work, snippet targeting	Content restructuring, structured data
GEO	Prompt research, AI citation tracking, entity setup, off-site mention strategy, share-of-AI-voice reporting	LLM behavior, citation analysis, new tools and reporting

Which should your agency add first?

Add AEO first as an upgrade to existing SEO retainers: it uses skills your team mostly has. Add GEO next as a separate line item, because it needs new methods, tools, and reporting. Don’t sell GEO before you can measure it; clients will ask for proof within 60 days.

For agencies

• Package it: AEO as a retainer upgrade; GEO as a setup fee plus monthly tracking and optimization.
• What to tell clients: “SEO keeps you findable, AEO makes you quotable, GEO makes you recommendable. You need all three.”
• What it takes internally: prompt research, citation tracking tools, entity and schema skills, and a new reporting format. That’s usually a hire or a partner.

FAQ

Add AEO and GEO to your agency without hiring →