> Do you remember when you were looking for good pair of hiking boots on Google and almost imminently you start seeing promoted posts about nice shoes discounts

> Do you remember when you were looking for good pair of hiking boots on Google and almost imminently you start seeing promoted posts about nice shoes discounts on Facebook and Twitter. I don't think this happens? > Basically what happens is that Google without your (explicit) confirmation collects all history of you search requests and sell it to another company. This definitely does not happen. Google doesn't sell search history to anyone else. It may be the case that Google itself remarkets things to you. But I don't think so, since how would they get paid in that transaction? Through affiliate links? Doubtful. Instead, I think what actually happens is that people make a search, they click a link, and target of that link (be it Amazon or some other store) associates their profile with interest in a particular product, then remarkets to that profile on Facebook.