Most agencies talk about "AI search" as if it is a single channel. It is not. ChatGPT, Perplexity, Gemini, Copilot, Claude, and Google AI Overview each pull from different data sources, prioritise different signals, and require different optimization logic. This resource hub breaks down exactly how each one decides which businesses to recommend — and what to do about it.
ChatGPT uses training data + Bing. Gemini uses Google’s Knowledge Graph. Perplexity reads live web. Claude leans on training data. The source shapes the strategy.
Perplexity favours Reddit and PR. Gemini favours your Google Business Profile. Copilot favours Bing rankings. One tactic does not fit all.
Optimizing for one engine can help or hurt on another. Understanding each lets you prioritise the levers that matter for your business.
Each engine's data source, what it favours, and the single highest-leverage optimization tactic.
| Platform | Data Source | What It Favours | Key Lever |
|---|---|---|---|
| ChatGPT Training data + live Bing browsing | Training corpus + Bing live browse | Entities with clear definitions & trusted third-party mentions | Entity clarity + listicle/PR mentions |
| Perplexity Live web search with inline citations | Live web search (its own + partners) | Citation-worthy pages: PR, Reddit, Quora, reviews, news | Digital PR + community presence |
| Gemini Google Knowledge Graph, YouTube & Business Profile | Google Knowledge Graph, YouTube, GBP, Maps | Businesses rich in Google’s ecosystem | Google Business Profile + YouTube |
| Copilot Built on Bing infrastructure | Bing search index + OpenAI models | Businesses that rank well in Bing | Bing SEO + Bing Webmaster Tools |
| Claude Training-data reasoning, favours well-structured content | Training corpus (less live-search dependent) | Well-structured, factual, authoritative content | Authoritative content on well-crawled domains |
| Google AI Overview Google’s index + Knowledge Graph + featured snippets | Google search index + Knowledge Graph | Top-ranking pages with featured-snippet-style content | Rank in Google top 3 + direct-answer content |
A full breakdown of how each engine works, what it prioritises, and the exact optimization logic for each.