SEO Strategy
SEO vs AEO vs GEO: The Complete Guide for 2025
Search is no longer just Google. AI-powered tools like ChatGPT, Perplexity, and Google's AI Overviews are changing how your prospects find and evaluate service providers. Here's what you need to know — and how to rank in all three.
TL;DR
SEO = ranking in traditional Google search results. Still essential. Not enough on its own.
AEO = appearing in Google's AI Overviews and answer boxes. Wins trust before a click happens.
GEO = being cited by name in ChatGPT, Perplexity, and Gemini responses. The new word-of-mouth.
The agencies winning 2025 are doing all three — and most of your competitors aren't.
Why the rules changed
For the last two decades, SEO meant one thing: rank on Google's first page. Brands invested in backlinks, on-page optimisation, and technical audits — and it worked. But in 2024, something shifted. Google began displaying AI-generated summaries above organic results. ChatGPT became the second-most-used search tool for research. Perplexity grew 10× in a single year.
The result? A meaningful share of search intent no longer touches traditional blue links at all. Your prospect types "best performance marketing agency in [city]" into ChatGPT — and gets a named list of recommended agencies. If your name isn't in that list, you don't exist.
This is why understanding the difference between SEO, AEO, and GEO isn't academic. It's a revenue question.
The three disciplines, side by side
SEO
Search Engine Optimisation
Getting your business's website to appear in search results
How it works:
→ Identify high-intent keywords and map them to service pages
→ Build authoritative backlinks and optimise on-page content
Pros:
✓ Proven, steady traffic driver
✓ Builds long-term authority
Cons:
✗ Slow to show results
✗ Vulnerable to algorithm updates
How to rank higher:
→ Focus on high-intent keyword clusters specific to your service
→ Run regular technical audits and refresh content quarterly
AEO
Answer Engine Optimisation
Getting your expertise extracted into answer boxes and AI Overviews
How it works:
→ Provide concise, direct answers to the questions your clients are asking
→ Use FAQ and How-To schema for structured data
Pros:
✓ Instant authority and brand visibility
✓ Strong for voice and mobile queries
Cons:
✗ Some users get the answer without clicking through
✗ Snippet positions change frequently
How to rank higher:
→ Answer questions in 40–60 words under clear headings
→ Add structured schema to FAQ and How-To content
GEO
Generative Engine Optimisation
Getting cited by name in detailed AI-generated recommendations
How it works:
→ Publish clear, well-structured thought leadership with citations and data
→ Build presence on the credible sources AI models pull from
Pros:
✓ Early-mover advantage in AI search
✓ Positions your firm as a trusted authority
Cons:
✗ Hard to measure direct impact
✗ Requires multi-platform presence beyond your website
How to rank higher:
→ Create factual, entity-rich content following E-E-A-T principles
→ Contribute to sources AI frequently references: industry reports, forums, publications
SEO: The foundation you can't skip
Despite every "SEO is dead" headline, organic search still drives roughly 53% of all website traffic. The difference is that the kind of SEO that works has changed. Keyword-stuffed articles and low-quality link schemes are not just ineffective — they actively harm you.
What works in 2025 is the combination of technical excellence (fast load times, clean crawlability, proper schema markup) with genuinely useful content that demonstrates first-hand expertise. Google's E-E-A-T framework — Experience, Expertise, Authoritativeness, Trustworthiness — is the clearest signal of what they reward.
The 2025 SEO checklist:
- Core Web Vitals passing (LCP < 2.5s, FID < 100ms, CLS < 0.1)
- Schema markup on every core page (Service, FAQ, Organization, Article)
- Original research and data points — content that earns citations
- Topical authority clusters, not single isolated pages
- Technical health audits quarterly, not annually
AEO: Win the answer, not just the click
Google's AI Overviews now appear for roughly 15–20% of all queries, with higher penetration for informational and comparison searches — exactly the kind of queries your prospects use when evaluating agencies. AEO is the discipline of optimising your content to be cited in these AI-generated summaries.
The counterintuitive insight: AEO content often drives more qualified traffic than standard organic results, because appearing in an AI Overview positions you as the authoritative source on that topic — before a prospect ever visits your site.
The tactical approach is simpler than most agencies make it sound: answer specific questions directly, in plain language, in 40–60 word blocks under clear H2/H3 headings. Apply FAQ schema. Use How-To schema for process-based content. The structure signals to Google's AI what your content is about and makes it extractable.
GEO: The new word-of-mouth
When someone asks ChatGPT "which marketing agency should I use for paid media?" — it answers. It pulls from training data and live retrieval (Bing index, cited sources, Reddit, industry publications). GEO is about making sure your agency's name, credentials, and positioning appear in those sources.
The mechanics: AI models weight entities that appear frequently, consistently, and in credible contexts. That means consistent brand mentions across LinkedIn, industry publications, case study databases, podcast appearances, and user-generated content. It means being cited in articles others write. It means having original data and research that other sources reference.
GEO is the longest-term play of the three — but it's also the most defensible. Once an AI model associates your brand with a particular category of expertise, that positioning compounds. Your competitors can outbid you on Google Ads. They can't easily undo the authority your brand carries in AI training data.
The integrated strategy: why you need all three
These disciplines reinforce each other. Strong SEO is the prerequisite for AEO — you can't get extracted into an AI Overview if your page isn't technically sound and topically authoritative. AEO content (clear, structured, expert) is also the kind of content that GEO rewards. And the brand-building work of GEO — industry citations, original research, publication presence — feeds back into SEO through high-authority backlinks.
The strategic question isn't which one to focus on. It's how to build a content and authority operation that serves all three simultaneously — and most agencies haven't figured that out yet.
Want Skymetric to build your SEO, AEO, and GEO strategy?
We run the full stack — technical SEO, AEO-optimised content, and GEO authority building — for marketing-led businesses that want to own their category across traditional and AI search.