SEO and GEO: what really differs between the two
Google documents that optimizing for its generative features is still search engine optimization, since they rely on its usual ranking systems. Three differences remain nonetheless: the surfaces targeted, the measurement available and the economics of the click. Only one justifies a separate budget line, and the other two cost nothing more.
- The underlying work is the same. Google writes that there is only one set of best practices, and dismisses the files and markup billed as AI-specific. Each one is a cost with no return.
- The first real difference is the surface: assistants outside Google fall entirely outside its documentation.
- The second is measurement. Google now provides impressions, never clicks. Elsewhere, no measurement is provided by the platform, and a budget you cannot read gets cut.
- The third is the click. Pew measures 8% click-through when a summary appears, versus 15% without. SEO buys visits, the citation buys presence.
- Only one of these three differences translates into a separate expense: tracking on the surfaces outside Google.
On this page
Answer surface
An answer surface is a place where a question receives a written answer rather than a list of links: summaries generated in a search engine, conversational mode, autonomous assistant. The notion is useful because it replaces the SEO-versus-GEO debate with a verifiable question: on which surfaces does your business appear, and which one provides a measurement. Some surfaces belong to a documented engine, others to no public documentation, which changes the cost of monitoring them.
What is identical
The short answer comes from Google itself. In its documentation published in May 2026, it acknowledges the acronyms AEO and GEO, and writes that from its point of view, optimizing for generative search amounts to optimizing for the search experience, and therefore to doing SEO. The reason is technical: its generative features draw on its ranking and quality systems, and in particular on a retrieval of documents from its index. The break the market is selling is thus first a matter of price, not method.
The consequence is direct. A page that is neither indexed nor well ranked will not be picked up in a generated summary. The work of crawling, indexing, structure and content quality is not duplicated: it serves both. For a management team, that means a search budget correctly executed already funds most of the visibility in generated answers.
Google goes further and names a series of practices sold as AI-specific and dismisses them. The llms.txt file, treated like any text file, the pre-chunking of content into fragments, the rewriting aimed at every variant of a term, and the Markdown versions or special markup. Each of these line items nonetheless appears in offers billed in Quebec, at prices no result will justify. It is the most avoidable cost of the whole subject.
Two extensions put numbers on the question: AI-referred traffic and what the sponsored ads in these surfaces are really worth.
What to settle when a vendor proposes a GEO offer
The financial risk of this subject is paying twice for the same work under two names. That is not a reason to ignore it, it is a reason to demand the breakdown before you sign.
- What does this offer contain that our current SEO does not, line by line?
- What share of the price covers content work, and what share covers measurement?
- On which surfaces outside Google do we want to be seen, and why those?
- Who tracks the answers, how often, and on which questions?
- If no citation is recorded within nine months, what do we stop?
The useful answer clearly separates content and measurement, leans on Google's documentation and names the surfaces targeted. A vague answer bills a file or proprietary markup, presents GEO as a new discipline, or promises AI-driven traffic without showing where the figure would come from.
Deciding whether an AI-visibility offer adds anything to what you already pay is settled on the real breakdown of the engagement. A 90-minute consultation settles it, with a written summary your team can hold up against any proposal.
What really differs
Three gaps remain, and it is better to name them precisely than to blur them into a narrative of rupture. Only one carries a cost.
| Point of comparison | Classic SEO | Generated answers |
|---|---|---|
| Underlying work | Indexing, structure, quality, authority | Identical, per Google |
| Surfaces covered | The search engine | The engine, plus undocumented assistants |
| Measurement provided | Impressions, clicks, queries, positions | Impressions only on Google, nothing elsewhere |
| Result purchased | A visit | A presence in the answer |
| Competition for the spot | A first position | Several sources cited at once |
| Sales attribution | Imperfect but workable | No reliable method to date |
The row on the result purchased is the one that changes the most decisions. The Pew Research Center measured the actual browsing of 900 U.S. adults and observed a click-through rate of 8% when a generated summary appears, versus 15% when it does not. Funding a citation while expecting traffic leads to guaranteed disappointment, then to cutting work that was producing recognition. The budget then disappears, and the company loses both.
The last row is the one that separates a serious vendor from another. No one in the field today can honestly link a citation in a generated answer to a closed sale.
What it changes for the budget
Only one of the three differences translates into a separate expense. The surfaces outside Google offer no official documentation and no measurement provided by the platform: presence there is tracked, manually or by tool, against a fixed list of questions. It is real, monthly work whose cost can be priced, and it is the only budget line honestly separable. Everything else belongs to the search budget you already pay.
The other two differences do not create an expense, they create a discipline of reading: not confusing presence with traffic, and not promising an attribution that does not exist. Both mistakes are costly: the first cuts a budget that was producing, the second ruins the vendor's credibility at renewal time. The full strategy and what large companies have changed are developed in from SEO to GEO. The content structure that makes a page citable is covered in the format that gets cited, and the general framework in what search optimization covers.
What stays in-house: the list of questions actually asked before a purchase in your sector, phrased in your customers' words, and the data only you can publish. What can be delegated: the monthly tracking on the chosen surfaces, the reading of the Search Console report, the restructuring of content and the verification of sources. This split decides the real cost of the engagement. A company that supplies twenty real questions gets a measurement that helps it decide. A company that buys a dashboard gets a dashboard.
How to read an offer that stacks acronyms is detailed in the GEO, AEO and SXO acronyms.
What each platform makes measurable is compared in who measures what, and who measures nothing.
Building a lasting presence in search and in generated answers is at the heart of the Attract customers with SEO and AI goal.
Already running a marketing team? See how we plug in as reinforcement on answer engine optimization.
Frequently asked questions about the difference between SEO and GEO
Does GEO replace SEO?
No. Google writes that its generative features rely on its usual ranking and quality systems, which makes the underlying work identical. A page that is neither indexed nor well ranked will not be picked up in a generated summary. What is added is a monitoring of surfaces that fall outside Google.
Do you need a separate budget for GEO?
Only one line is justified: tracking presence on assistants outside Google, which offer neither official documentation nor measurement provided by the platform. The rest of the work serves both. An offer that bills two content envelopes bills the same thing twice, and that is the main risk of wasted spend on this subject.
Does GEO bring traffic?
Far less than classic SEO. The Pew Research Center measures a click-through rate of 8% when a generated summary appears, versus 15% without. What you buy is a presence in the answer and the recognition that follows, not a visit.
What is the real difference to remember?
SEO targets a documented engine, with full measurement and a result that is a visit. Generated answers target several surfaces, some with no documentation at all, with partial measurement and a result that is a presence. The underlying work, for its part, does not change.
- Google Search Central, Optimizing your website for generative AI features on Google Search, official documentation published 15 May 2026, accessed July 2026.
- Google Search Console, help center, Generative AI performance report (Search), official documentation, accessed July 2026.
- Pew Research Center, Google users are less likely to click on links when an AI summary appears in the results, browsing study of 900 U.S. adults, March 2025.
Gabriel almost always takes your first call and carries out your audit. He builds the strategy starting from your growth goal: where to put your budget, which market to test and how to connect each lead to a real sale in your CRM. He mainly leads engagements for three goals: Optimize the profitability of your digital campaigns, Develop a new market, and Generate demand and growth. With Geneviève, he also works on organic search (SEO), AI visibility (GEO) and conversion rate optimization (CRO). The sales a Google Ads or Meta Ads campaign brings in depend on the page that receives the click. He writes mainly about marketing strategy, paid advertising and measurement.
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