Where each shopping assistant gets its data
There is no single shopping index. Each assistant draws on its owner's own catalogue first, which is why a product can appear in one and not the others.
- Google's AI shopping features draw on the Shopping Graph, fed by Merchant Center feeds and crawled product pages
- ChatGPT shopping uses merchant feeds submitted to OpenAI plus pages crawled by OAI-SearchBot
- Amazon's Rufus answers from Amazon's own catalogue, listings, reviews and customer questions, so off-Amazon content matters little there
- Review text is mined for use cases. A review saying a bag fits a 16-inch laptop answers a query no spec sheet does
- Returns, shipping speed and availability are attributes too, and assistants can filter on them