Field Notes · GEO
GEO vs SEO: Overlap and Differences
A definitional breakdown of what carries over from search optimization to answer-engine optimization, what is genuinely new, and how to decide which one your business needs.
SEO and GEO are not rivals, and they are not the same discipline either. SEO earns a position in a ranked list of links. GEO earns a mention inside an AI-generated answer. Most of the engineering work that makes a page rank well also makes it easy for a model to retrieve and cite, which is why the two share a large foundation. But the unit of success is different, the measurement is different, and a handful of GEO-specific tactics have no real equivalent in classic search.
This is a definitional comparison you can forward to a CEO without a glossary. It covers what each term means, what genuinely carries over, what is new, how you measure each, and how to decide whether you need one, the other, or both.
What is SEO, in one line?
SEO is the practice of earning visibility in a search engine's ranked list of results. The engine crawls pages, indexes them, scores each one against a query, and returns an ordered list of links. The goal is to occupy a high position for queries your buyers actually type, then convert the click.
The mechanics are well understood after two decades: technical health so pages can be crawled and rendered, on-page relevance so a page clearly matches intent, and authority signals like links and reputation so the engine trusts the source. The output is a rank, and the prize is a click.
What is GEO, in one line?
GEO, generative engine optimization, is the practice of getting your content retrieved, synthesized, and cited inside the answers produced by AI engines like ChatGPT, Perplexity, Claude, Google's AI Overviews, and Gemini. These systems do not hand the user ten links. They read across many sources, write a single synthesized answer, and attribute some of the claims to the sources they drew from.
So the goal shifts. You are not trying to be the number one link. You are trying to be the passage the model lifts into its answer and the brand it names while doing so. The output is a citation or a mention, and the prize is being part of the answer before any click happens.
What genuinely carries over from SEO to GEO?
Most of the technical and editorial foundation carries over completely, because AI engines retrieve from the same open web that search engines crawl. A page that cannot be crawled, rendered, or trusted is invisible to both. If your SEO fundamentals are weak, GEO has nothing to stand on.
- Technical health: fast rendering, clean HTML, no crawl blocks, content present without requiring heavy client-side execution. Retrieval systems favour pages they can read cheaply and reliably.
- Crawlability and indexation: if a page is blocked, orphaned, or buried, neither a search index nor an answer engine will surface it. Allowing the relevant AI retrieval bots matters as much as allowing classic crawlers.
- Authority and reputation: links, brand mentions, and a credible track record still signal trust. Models lean toward sources that the wider web already treats as reliable.
- Content quality and relevance: accurate, specific, well-structured content that matches real intent wins in both worlds. Thin or vague pages lose in both.
What is genuinely new with GEO?
The new work in GEO is about being quotable, not just rankable. A model does not place your page in a list. It extracts sentences, checks them against other sources, and decides which to repeat and attribute. That changes what you optimise at the sentence and entity level.
- Passage-level structure: each heading should be a clear question or claim, and the first sentence beneath it should answer that heading outright. Models extract self-contained passages, so a paragraph that only makes sense after three others rarely gets pulled.
- Entity consistency: your name, category, location, products, and key facts should be stated identically across your site and your off-site presence. Models build an internal picture of who you are from many sources, and contradictions weaken confidence.
- Third-party corroboration: answer engines cross-check claims. A fact repeated on independent, credible sites is far more likely to be stated as true and attributed to you than a claim that lives only on your own page.
- Citation as the unit of success: in SEO the unit is a ranked URL. In GEO the unit is a cited passage. You optimise individual statements to be liftable, sourced, and unambiguous, not just whole pages to rank.
Supporting machine-readable signals, such as structured data and a clean information architecture, help here too. They do not force a citation, but they make your facts easier to parse and reconcile, which raises the odds a model trusts and repeats them.
How does measurement differ?
SEO measures position and the traffic it earns, while GEO measures how often you are cited or named and how your presence in answers compares to competitors. They answer different questions, so you track them with different instruments.
- SEO metrics: ranking position for target queries, impressions, click-through rate, and organic sessions. The chain runs from rank to click to conversion, and most of it is visible in search console and analytics.
- GEO metrics: citation rate, whether you appear as a named source for the prompts that matter to your buyers, and share of voice in answers, meaning how often you show up relative to rivals across a set of representative questions.
- Sentiment and accuracy: because a model can describe you, GEO also tracks how you are described. Being cited but mischaracterised is a different problem from not being cited at all.
- Attribution reality: GEO often influences a buyer before any click, so a share of its impact appears as later branded search, direct visits, or pipeline rather than a tidy referral line. Plan for directional measurement, not a single clean number.
Do you need GEO, SEO, or both?
Almost every business needs both, because they share a foundation and capture demand at different moments. The useful question is where to start, and that depends on how your buyers research and where your gaps are today.
- Start with SEO if your technical foundation is weak, your pages are hard to crawl, or you do not yet rank for your core commercial terms. Fixing this also unlocks GEO, since answer engines retrieve from the same pages.
- Lean harder into GEO if your category is increasingly researched through AI assistants, if competitors are getting named in answers and you are not, or if you sell considered purchases where buyers ask open questions before they ever search.
- Do both in sequence, not isolation: fix the shared fundamentals first, then layer passage-level structure, entity consistency, and corroboration on top. The same content asset can rank in search and be cited in answers when it is built well.
- Skip neither for long. Search still drives the majority of intent-rich discovery for most businesses, while a growing share of high-consideration research now starts inside an AI answer. Covering only one leaves the other channel to competitors.
Treat GEO and SEO as one strategy with two outputs. The crawlable, fast, trustworthy site you build for rankings is the same site an answer engine retrieves from. The difference is the final layer: structure your passages to be liftable, keep your entity facts consistent, and earn the third-party corroboration that makes a model confident enough to cite you by name.
Questions people ask
Is GEO replacing SEO?
No. GEO sits on top of SEO rather than replacing it. Answer engines retrieve from the same crawlable, trustworthy pages that search engines rank, so weak SEO undermines GEO directly. The smart move is to keep your SEO fundamentals strong and add the GEO-specific layer of liftable passages, consistent entity facts, and third-party corroboration.
Can I do GEO without doing SEO first?
Not effectively. GEO depends on the same technical foundation as SEO: pages must be crawlable, fast, and trusted before any AI engine will retrieve and cite them. If your site has crawl blocks, slow rendering, or thin content, fix those first. GEO tactics like passage-level structure only pay off once the underlying pages can actually be read and trusted.
How do I measure GEO results?
Track citation rate and share of voice: how often you are named as a source across the prompts your buyers actually ask, and how that compares to competitors. Also watch how you are described, since being cited but mischaracterised is its own problem. Because GEO often influences buyers before any click, expect part of the impact to show up as later branded search and direct demand rather than referral traffic.
What is the single fastest GEO win?
Rewrite the first sentence under every heading so it answers the heading directly in one or two sentences. Models extract self-contained passages, and a heading that is a clear question or claim followed by an immediate answer is far easier to lift and cite. It is a low-cost edit that improves both citation odds and readability for humans.