How AI search works — from question to cited answer

The four steps behind most AI answers

Different products implement this differently, but the broad pattern is shared by Google’s AI features, ChatGPT search, Perplexity, Gemini and Copilot.

1. Understand and rewrite the question

The system first works out what is being asked. Long, conversational questions are often rewritten into one or more shorter searches. Google describes a technique it calls query fan-out for AI Overviews and AI Mode: issuing multiple related searches across subtopics and data sources to build a response (Google Search Central). OpenAI’s description of ChatGPT search similarly refers to sending rewritten queries to search providers.

What this means for you: your page doesn’t only compete for the exact question typed. It competes for the sub-questions the system generates — “pricing”, “integrations”, “alternatives”, “reviews”. Content that answers those sub-questions directly has more opportunities to be retrieved.

2. Retrieve candidate sources

Next, the system fetches documents. Where they come from depends on the platform:

What this means for you: if a platform’s crawler or index can’t access your pages, they can’t be retrieved there. This is why technical SEO and a deliberate crawler policy matter for AI visibility.

3. Generate an answer grounded in the sources

A large language model reads the retrieved material and writes an answer. This approach is often called retrieval-augmented generation (RAG): the model’s general language ability is combined with specific, fetched evidence. The model tends to use passages that directly address the question, state facts clearly and agree with other sources.

What this means for you: vague marketing copy is hard to use. A sentence like “Acme Payroll supports automated TDS calculation for Indian companies, with filings generated each quarter” can be used; “we deliver innovative payroll excellence” cannot. This is the core of answer engine optimization.

4. Attach citations

Finally, the product decides which sources to show as citations and how. Perplexity numbers its sources inline; Google shows supporting links within and beside AI Overviews; ChatGPT shows source links and a sources panel when it searches; Copilot shows linked references. Not every source used is shown, and not every answer includes citations.

What this means for you: being used and being visibly credited are related but not identical. Measure both.

Where brand mentions come from

Notice that your brand can appear in an answer even if none of your pages were retrieved. If the retrieved sources are a review site, a comparison article and a news story that all mention you, the answer may mention you too — and describe you the way they do. That is why GEO, brand mention building and entity optimization work on sources beyond your own website.

There is also the model’s background knowledge from training. For well-known brands, a model may “know” things about you even without retrieval — including outdated facts. Consistent, current information across the web is the best long-term correction.

What this model tells you to do

1. Make sure you can be retrieved. Crawlable, indexable, fast pages; no accidental blocks of search crawlers.
2. Answer the sub-questions. Cover pricing, comparisons, use cases, limitations and how-tos clearly — not just your headline keyword.
3. Write usable passages. Specific, self-contained, factual sentences near the top of each section.
4. Be described well elsewhere. Reviews, directories, comparisons and coverage shape mentions and recommendations.
5. Keep facts consistent. Name, description, offering, pricing model and locations should match everywhere.

Limits of this model

This is a simplification. Platforms use different models, rerankers, safety filters and presentation rules, and they change frequently. None publish a full description of how sources are selected. Treat any claim of a precise “AI ranking factor” with caution, and judge tactics by whether they also make your content more useful to people.