THINK BIG
SEO · GEO · AI Visibility
You Rank on Google. So Why Doesn’t ChatGPT Mention You? — SEO vs. GEO, Explained
SEO gets you found in search results. GEO gets you mentioned in AI answers. Same foundation, different finish line: AI picks passages and weighs what others say about you, so ranking well doesn’t mean AI will name you.
1. What’s happening: people are asking AI, not just searching
On October 8, 2025, Google launched AI Mode in Traditional Chinese for users in Taiwan. AI Mode uses a “query fan-out” technique: it breaks a question into subtopics, runs many searches at once, and returns a synthesized answer with links. ChatGPT also searches the web automatically when a question would benefit from current information, and its answers include clickable citations.
User behavior is shifting. Instead of typing keywords, scanning ten blue links, and comparing pages themselves, more people now ask a full question and wait for an AI to hand back an answer. A Microsoft post from October 2025 put it plainly: in AI search, it’s not just about being found — it’s about being selected.
That leads to a question we hear constantly: “My site ranks well on Google. Why won’t ChatGPT mention us?”
| SEO (Search Engine Optimization) | GEO (Generative Engine Optimization) | |
|---|---|---|
| Goal | Get found and clicked in search results | Get mentioned, cited, and described accurately in AI answers |
| Where | Google and Bing results pages | ChatGPT, Gemini, Google AI Mode, Perplexity, Copilot |
| Unit | Where a whole page ranks | Whether a specific passage gets pulled into an answer |
| Track | Indexing, rankings, clicks | Mentions, citations of your URL, accuracy of description |
2. What the sources say: official docs say “same foundation,” research says “different outcomes”
Google’s position: get your SEO right first. Google Search Central states there are no additional requirements to appear in AI Overviews or AI Mode, and no special optimizations needed. A page must be indexed and snippet-eligible. The same page says you don’t need new machine-readable files, AI text files, or special schema.org markup. In other words, for Google’s own AI features, SEO is the ticket in.
Other AI tools don’t use Google’s index. ChatGPT search relies on OpenAI’s own crawler, OAI-SearchBot. OpenAI’s documentation says sites that block it will not be shown in ChatGPT search answers. Perplexity runs its own crawler, PerplexityBot. Ranking on Google only tells you Google can see you. Everything else needs to be checked separately.
AI selects passages, not pages. Microsoft explains that assistants like Copilot don’t read a page top to bottom. They break content into smaller pieces, evaluate each one, and assemble an answer from multiple sources. The practical advice: keep the title, description, and H1 aligned; use clear subheadings to separate ideas; write answers that stand on their own in one or two sentences; use lists and comparison tables; don’t bury key information in tabs, images, or PDFs. The same post acknowledges there’s no secret formula that ensures selection.
Research: real effects, no stable formula. The paper that coined the term, “GEO: Generative Engine Optimization” (Princeton and collaborators, KDD 2024), found that rewrites such as adding quotations, statistics, and citations could boost visibility in AI responses by up to about 40% on the authors’ benchmark. A 2026 review of 45 studies is more cautious: topical relevance and position in context are the most reproducible levers, and no reviewed technique shows a stable, long-term, cross-platform causal effect.
Platform rules are getting sharper. Google’s spam policies now explicitly list attempts to manipulate generative AI responses as a spam technique, and mass-producing low-value pages falls under scaled content abuse. Hidden text and page farms aimed at AI are a dead end.
3. Our own website: Google is warming up, AI still rarely mentions us
In early October 2026, we ran our own site through a six-layer audit: technical foundation, content, structured data, authority and entity, off-site citability, and measurement.
On-site layers scored 80–90%. Off-site layers scored 20–30%. Technical foundation, structured data, and measurement all landed in the 80–90% range. “Authority and entity” and “off-site citability” landed at 20–30%. The gap wasn’t on our website. It was everywhere else.
Google ranks us; AI rarely brings us up. Google Search Console shows several of our guides on the first page of results for their target queries. But when we ran a round of the same topics phrased as questions to AI, we barely showed up. Even a guide whose headline is that exact question wasn’t used as a source in that round. (A single round isn’t statistically reliable — that realization is what pushed us to rebuild our measurement method, which we cover in the next issue.)
AI has even described us incorrectly. We once asked an AI chatbot what our company does, and it said, with full confidence, that we had nothing to do with AI. An AI’s picture of a small company comes from the little information it can reach. When that information is thin or inconsistent, it fills in the blanks.
What we’ve done: opened robots.txt to major AI crawlers including OAI-SearchBot and PerplexityBot; put a complete one-sentence company definition at the top of our homepage; added Organization, Article, and FAQ structured data across the site; standardized our name and description everywhere; published an English edition of every NEWS article because research shows ChatGPT cites a large share of English sources when answering questions about Taiwan.
What we’re still building: off-site mentions. Bylined media coverage, public directory listings, and long-form posts on our own named social accounts. We won’t fill the gap with fake accounts or paid forum posts.
The biggest lesson: good SEO makes you findable to AI. Getting AI to actually say your name takes other people talking about you, consistently.
4. Our recommendations: do SEO and GEO together, measure them separately
Make sure both Google and AI crawlers can get in. Key pages should be indexed and snippet-eligible. Check that robots.txt doesn’t accidentally block search crawlers like OAI-SearchBot or PerplexityBot. (Whether to allow AI training crawlers is a separate decision.)
Write every section so it can be quoted on its own. One subheading, one question. Put the answer in the first sentence or two. Spell out numbers, definitions, steps, and comparisons. This helps both Google snippets and AI passage selection.
Keep your identity consistent across the web. Use the same legal name, short name, address, phone number, and service description on your website, Google Business Profile, social bios, and public directories.
Earn real off-site mentions. Think industry association and government directories, Google Business Profile, bylined media contributions, and long-form posts on your own named accounts. Don’t hire people to pose as happy customers on forums. Dcard, a popular anonymous forum in Taiwan, permanently bans accounts used for word-of-mouth marketing, and an undisclosed paid endorsement in a consumer’s voice may violate Taiwan Fair Trade Commission rules on endorsement advertising.
Measure each channel on its own terms. Use Search Console for Google; for Copilot and Bing, use the AI Performance report in Bing Webmaster Tools (public preview since February 2026); for ChatGPT, Perplexity, and other AI answers, use repeated sampling.
Bottom line: SEO lets AI find you. GEO gets AI to say your name. Same foundation, different finish line.
One audit. Both sides. Built into every piece of content.
(The following reflects Think BIG’s own position and is separate from the neutral reporting above.)
We used our own website as the first test case, working through everything ourselves before offering the same method to businesses: Think BIG Search Visibility (SEO + GEO) — get found on Google, get named by AI.
One audit, both sides: Google side covers indexing, technical foundation, keyword standing, and on-page writing. AI side covers whether each AI mentions you, how it describes you, and which sources it cites. Both roll up into one “top three things to fix first” list.
One piece of content, both jobs: every piece is written for SEO (keywords, titles, internal links) and GEO (answer first, quotable passages, off-site placement) at the same time.
Measurement with a stated method: AI answers change from run to run, so we use repeated sampling and report each AI separately. One screenshot is never a conclusion.
Compliant by design: no bought links, no click farms, no fake accounts, no fake reviews, no hidden text. We don’t promise rankings or sales results. We promise to do the right things well and show you the numbers every month.
FAQ
- Q1: What’s the difference between SEO and GEO?
- SEO helps your pages get found in Google and Bing search results. GEO helps AI tools like ChatGPT, Gemini, and Perplexity mention you, cite your pages, and describe you accurately when they answer questions. Both require indexable sites and clear content, but AI assembles answers from individual passages and gives weight to what other sites say about you.
- Q2: I rank well on Google. Why doesn’t ChatGPT mention me?
- ChatGPT search uses OpenAI’s own crawler and index rather than Google’s rankings, and for many questions it doesn’t search at all, answering from what the model already learned. It also favors passages that stand on their own and claims that multiple sources agree on. A strong Google ranking doesn’t carry over automatically.
- Q3: Do I need to do anything extra to appear in Google’s AI Overviews?
- According to Google’s documentation, no. There are no additional requirements, special files, or required structured data. The page must be indexed and eligible to show with a snippet in Google Search. Solid SEO fundamentals are the prerequisite.
- Q4: Do I need an llms.txt file for GEO?
- Google says you don’t need new machine-readable files or AI text files to appear in AI Overviews or AI Mode. You can add one, but don’t treat it as a priority. Indexability, clear passages, a consistent identity, and genuine off-site mentions matter more.
- Q5: How can I tell whether AI mentions my company?
- Don’t judge from a single question. AI answers vary from run to run. Ask the same question several ways, repeat each one multiple times, track it over several weeks, and record separately whether you were mentioned, whether your URL was cited, and whether the description was accurate. For Copilot and Bing, check the AI Performance report in Bing Webmaster Tools.
This article combines industry reporting with Think BIG’s first-hand work on its own website. All cited official documents and studies are linked; platform rules and features follow the latest official documentation. Data about our own site is shown only as relative figures and trends. The AI chatbot mentioned is not named, and nothing here is directed at any company or product.