1. get web search result

2. insert a bunch of extra stuff (ads, sidebar, wikipedia result, results for maps/youtube/etc., top stories, people also ask, images, discover, ...)

3. remove URLs (replace with tracking links)

4. deliver to user

Don't sell search results? I find that one dubious. I experienced an ad labelled link in the middle of the actual search results. I wanted to screenshot it bad but it was in incognito. Weirdly, bing also does this on incognito, they apply different styles at least on mobile. It might be an A/B test but I have my doubts.

It's nice, but not really a technical explanation.