GEO vs SEO: what's the difference, and do you need both?

SEO gets your content ranked. GEO gets it cited. You need both because they solve different problems, and in 2026, solving only one means you’re invisible in the other. SEO (Search Engine Optimisation) makes your content findable in traditional Google search results. GEO (Generative Engine Optimisation) makes your content citable by AI engines like ChatGPT, Perplexity, and Google AI Mode. The overlap between them is significant (structured content, E-E-A-T, technical hygiene), but the gaps are where companies get caught out.

Gartner predicted traditional search volume would drop 25% by 2026 (E-Commerce Times ). So far it hasn’t happened: Graphite found no downward trend in visits to Google or to search engines as a whole (Graphite ). What has changed is where answers come from. AI-referred traffic converts at 14.2% compared to Google organic’s 2.8% (Exposure Ninja via Superlines ), so if you only optimise for one channel, you miss the other.

I’m Owen Steer , and at Fifty Five and Five I’ve built AI search optimisation systems that cover both SEO and GEO, for B2B technology clients and for our own site. The pattern I keep seeing: companies that treat GEO as a separate initiative from SEO end up doubling their work for half the result. The ones that integrate both into a single content strategy get better outcomes from less effort. This piece covers what each one does, where they overlap, and how to run them together.

GEO vs SEO side by side

Both need the same foundations: pages search engines can crawl and index, content worth reading, and clear authorship. That’s why GEO sits on top of SEO rather than replacing it.

The last row is where most teams get stuck. Google gives you Search Console, but no AI assistant gives you a report, so you have to ask them. We did this to ourselves: we put 18 questions our buyers ask to ChatGPT and Claude, twice each, and were named in 10 of 72 answers. Almost every mention traced back to a page with specific numbers on it, or to a directory list. The full results are in how to get your company recommended by ChatGPT , and our AI search visibility tool post shows how to run the same check on your own company.

What is GEO marketing and how is it different from SEO

GEO marketing (Generative Engine Optimisation) is the practice of structuring your content so AI-powered search engines cite, reference, or recommend it when answering user questions. SEO targets traditional search engines and optimises for ranking position and clicks. GEO targets AI engines and optimises for citations and inclusion in AI-generated answers.

The distinction matters because the selection criteria are different. Google ranks pages based on hundreds of signals: relevance, backlinks, domain authority, page speed, content quality, and more. AI engines like ChatGPT, Perplexity, and Google AI Mode evaluate content differently. They’re looking for extractable answers, verifiable expertise, and content that can stand alone as a self-contained response to a specific question. A page that ranks #1 on Google might never get cited by AI if its answer is buried in paragraph four or hidden behind a registration wall.

A quick disambiguation, because this catches people out (and even catches AI engines out): “GEO” in marketing has two completely different meanings. There’s GEO as in Generative Engine Optimisation (what this page is about), and there’s GEO as in geographic targeting or geolocation-based marketing. These are entirely separate disciplines with different goals, different techniques, and different tools. When we ran Query Fan-Out analysis on this topic, Google’s own AI (Gemini) defaulted to the geographic interpretation of “GEO” in 6 out of 10 test queries where the context didn’t explicitly say “generative engine optimisation.” If even AI engines get confused, real users definitely do. If you’ve searched for “GEO marketing” or “GEO SEO” and landed on articles about local SEO, geofencing, or location-based targeting, that’s a different discipline entirely. This page is about Generative Engine Optimisation: getting your content cited by AI search engines like ChatGPT, Perplexity, and Google AI Mode.

GEO vs SEO vs AEO: where answer engine optimisation fits

AEO, answer engine optimisation, is mostly another name for the same work. It came first, when the goal was to be the one answer Google showed in a featured snippet or a voice assistant read out. GEO, generative engine optimisation, is the newer name, from the 2023 research paper that coined it (Aggarwal et al. ), and it’s about being cited when AI writes the answer.

In practice AEO and GEO ask for the same things: answer the question early, back it with evidence, and be on the sites AI reads. Some people use AEO for Google’s AI Overviews and GEO for chat assistants, and most use the two interchangeably. If your team says AEO, you’re talking about the same job.

GEO optimisation: the layer you need on top of SEO

GEO optimisation is what you add to your existing SEO process to make content citable by AI engines, not just rankable by Google. It’s not a replacement. It’s an additional layer that builds on the SEO foundation you already have.

The researchers at Princeton and Georgia Tech who coined the term GEO found that applying GEO techniques can boost visibility in generative engine responses by up to 40% (Aggarwal et al., 2023 ). That’s a meaningful lift, and it comes from specific structural changes to content you might already be producing.

Six things GEO optimisation adds on top of SEO:

1. Answer-first structure. Every section opens with a direct answer to the question posed by the heading. AI engines extract from the beginning of content blocks. If your answer is in paragraph four, AI has moved on to someone who leads with it.

2. Standalone sections. Each section must work if pulled out in isolation. AI might cite your third H2 without any of the surrounding context. Every section needs enough context to make sense on its own.

3. Open access. 99.3% of LLM citations come from open-access sources (SegmentSEO ). Gated content is invisible to AI engines. The old model of gating your best content to capture leads works against you in AI search.

4. E-E-A-T as a binary filter. For traditional SEO, E-E-A-T is one of many ranking factors. For GEO, it operates as a pass/fail gate. An analysis of AI Overview citations found that 96% come from sources with strong E-E-A-T signals (Wellows ). If your content lacks documented expertise, AI engines skip it entirely.

5. Author attribution. Named experts with verifiable backgrounds get cited more than anonymous or brand-bylined content. Author profiles, LinkedIn links, and sameAs schema all reinforce the signal that a real person with real expertise wrote this.

6. Offsite engagement. Brand mentions on third-party platforms now correlate 3x more strongly with AI visibility than backlinks do (Ahrefs ). Your experts need to be visible on Reddit, LinkedIn, and Quora, not just on your own website.

None of this contradicts SEO. It extends it. A page with answer-first structure, strong E-E-A-T, and open access will rank well on Google AND get cited by AI engines. The companies I work with that build both layers into a single content marketing process get compounding returns from both channels.

SEO and AI: what changed about how search engines find and use your content

SEO hasn’t died. But AI has changed what SEO needs to deliver. The goal used to be straightforward: rank high, capture the click, nurture the lead. That model still works, but a growing share of the answer economy now happens before anyone clicks anything.

Organic click-through rates have dropped 61% for queries where an AI Overview appears, from 1.76% to just 0.61% (Seer Interactive ). That’s not a marginal decline. It’s a structural shift in how value flows from search. For every 100 clicks a #1 ranking used to earn, brands now get roughly 35. The clicks aren’t gone entirely. But AI is answering the question inline, and fewer people need to click through to find what they’re looking for.

At the same time, 62% of brands are “technically invisible” to generative AI models. When asked direct questions about their core services, AI failed to cite them in 81% of test cases (Fuel Online ). That’s not a content quality problem. It’s a visibility problem. These brands have content. AI just can’t find it, extract it, or trust it enough to cite. They’ve invested in SEO for years, built content libraries, and earned rankings. But they never optimised for the AI layer, and now that layer is where a growing share of their audience gets answers.

AI has changed what SEO needs to deliver in three specific ways. First, content structure: traditional SEO rewarded comprehensive, well-linked pages. AI search rewards content structured for extraction, where every section answers a question in its opening sentences and works in isolation. Second, authority signals: SEO measured authority through backlinks and domain rating. AI measures authority through E-E-A-T signals, author attribution, and whether claims can be cross-referenced against other sources. Third, distribution: SEO meant being visible on Google. AI search means being visible on Google AND across the platforms AI engines consult (Reddit, LinkedIn, industry publications). The foundation hasn’t changed: traditional SEO still handles getting pages crawled, indexed, and ranked. Without that, AI engines can’t find your content to cite it. Google’s index is still the primary source most AI engines draw from. But on top of that foundation, the bar has risen.

The companies I work with that are navigating this well aren’t abandoning SEO. They’re extending it. The SEO work they were already doing (technical hygiene, keyword research, content quality) is still valuable. They’re adding the GEO layer: answer-first structure, author attribution, offsite engagement, and passage-level optimisation. Both channels reinforcing each other, driven by the same content strategy.

Building a GEO strategy: the layers SEO doesn’t cover

A GEO strategy starts where SEO stops. If your SEO is solid (your site is crawlable, your content ranks, your technical foundation is clean), then GEO is the set of additional layers that make AI engines cite you, not just index you.

What SEO already covers that GEO builds on:

• Technical foundation: Crawlability, indexation, page speed, structured data, internal linking. GEO needs all of this. If AI crawlers can’t access your pages, nothing else matters. The GEO audit checklist I use starts with the same technical checks as a traditional SEO audit.
• Content quality: Well-researched, well-written content that answers real questions. GEO doesn’t lower the bar. It raises it.
• Keyword research: Understanding what people search for and building content around those queries. GEO adds an extra research layer (understanding what AI engines search for when answering those queries), but the starting point is the same.

What GEO adds on top:

• Content extractability: Not just page-level optimisation, but passage-level. Every section, every H2, needs to work as a standalone answer. AI doesn’t cite whole pages. It extracts specific passages.
• Offsite engagement: Reddit, LinkedIn, Quora. Brand mentions from real experts on platforms AI engines trust. This is the layer most companies skip, and it’s the one that correlates most strongly with AI visibility. I cover the full approach in the AI citations piece.
• Author profiles and documented expertise: Named authors with verifiable backgrounds, real project stories, and consistent voice. E-E-A-T isn’t optional for GEO. It’s the filter.
• Multi-platform visibility: ChatGPT, Perplexity, and Google AI Mode all source content differently. A GEO strategy ensures your content is visible across all of them, not optimised for one.

What running SEO and GEO together actually looks like

In practice, running SEO and GEO together doesn’t mean two separate workflows. It means one content process that serves both channels. You research the question using keyword data AND query fan-out analysis (understanding what AI engines actually search for). You structure the content for both ranking and extraction: keyword-backed H2s that also work as standalone answer blocks. You write with E-E-A-T signals that satisfy both Google’s quality guidelines and AI’s citation filters. And you distribute across your own site AND the platforms where AI engines look for third-party validation.

The overlap is larger than most people expect. Answer-first structure, sourced statistics, schema markup, and open access all benefit both SEO and GEO simultaneously. The gap is mainly in offsite engagement and passage-level extractability, which SEO doesn’t require but GEO depends on. Adding those layers to an existing SEO process is incremental, not a rebuild.

The future of SEO is running it alongside GEO, not replacing it

Search isn’t shrinking. Counting AI assistants and search engines together, it grew 26% worldwide between early 2023 and the end of 2025 (Graphite ). What’s changing is where the value sits. Traditional organic clicks are declining for queries where AI provides an inline answer. But AI-referred traffic, when it does arrive, converts at 14.2% compared to Google organic’s 2.8% (Exposure Ninja via Superlines ). The citation channel is smaller in volume but significantly higher in quality.

The investment decision most companies are facing isn’t “SEO or GEO.” It’s “how do I layer GEO on top of the SEO I’m already doing.” That’s the right framing, because SEO provides the infrastructure GEO needs. Without pages that are crawlable, indexed, and ranking, AI engines have less to work with when constructing their answers. Google’s index is still the primary source most AI engines consult. Abandoning SEO to chase GEO would be like removing the foundation from a building because you want to add another floor.

The companies I work with that are getting this right share a pattern. They’re not running SEO and GEO as separate initiatives with separate teams and separate budgets. They’re running one content strategy that serves both channels. The keyword research informs the structure. The structure serves both ranking and extraction. The author profiles satisfy both E-E-A-T for Google and citation requirements for AI. The offsite engagement builds brand mentions that improve both domain authority (SEO) and AI visibility (GEO). Everything reinforces everything else.

The budget question comes up in every conversation I have about this. “Should we shift spend from SEO to GEO?” No. Layer GEO on top. The incremental cost of adding GEO to an existing SEO process is a fraction of running them separately, because most of the work (research, content quality, technical hygiene) serves both channels. The additional investment is in content structure, author attribution, and offsite engagement, not in rebuilding everything from scratch.

People keep telling me the lines between SEO and GEO will blur until they’re indistinguishable. I don’t believe that. I can see it. It’s already happening. The tools and processes I’ve built for B2B technology companies integrate both layers from the start. The content performs in traditional search and gets cited by AI engines. Not because it’s optimised twice, but because it’s built once with both channels in mind.

If you’re figuring out how SEO and GEO fit into your content strategy, the pillar piece on building content that AI search engines actually cite covers the full framework.

Do you need both SEO and GEO

The question was what’s the difference between SEO and GEO and whether you need both. The answer: yes, you need both, and they work better as one integrated system than as separate initiatives.

SEO gets your content crawled, indexed, and ranked. That’s the foundation. Without it, AI engines have less to draw from when constructing answers. GEO gets your content cited by AI engines: structured for extraction, backed by documented expertise, and visible across the platforms AI trusts for third-party validation. The overlap between them (structured data, content quality, E-E-A-T, technical hygiene) means most of the work serves both channels simultaneously.

The future isn’t SEO or GEO. It’s both, running together, driven by the same content strategy. Traditional search isn’t disappearing. AI search is growing alongside it. The companies that build for both channels now are the ones that will be visible wherever their audience looks, whether that’s a Google results page or a ChatGPT answer.

If you want to know where you stand today, get in touch and we’ll put your buyers’ questions to the AI assistants for you.

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