A really smart person figured out that AI built into Chrome checks out every website you visit to decide if the page is a shopping page (product or store). To save on computing it only looks at some specific signals:

• Breaks up the page content into 100-word chunks
• Tokenizes (compresses) each chunk & only looks at the first 64 tokens, which is like 35-50 words, so it's consuming about 450 words total per page
• Prioritizes the page title and URL for clues as to what the page is about

If Chrome's Shopping Classifier determines it's a shopping page, it saves that info as a "score" in the browser history. It uses past visits to help users more easily find products they browsed before (like with the "resume your journey" cards in a new tab. If a user visits a lot of shopping pages, THEY get classified as a "shopping user" and Chrome will show special features like price tracking alerts, shopping insights in the side panel, and more.

So if an ecommerce website has a huge main navigation, cookie consent banners, or any other stuff that takes up the first 400 or so word of the page, it might prevent Chrome from seeing enough content to figure out that it's a shopping page, and then customers might not see the browser shopping alerts/features that can prompt them to come back and complete the purchase.