

I think the idea is that you are interested in a topic, and so they show you an advertisement that says “Product A does X!” You might not think about it nor click on it, but maybe later on, you need to do X, and then you remember, “hey, Product A does X, I should check it out.” And then that maybe turns into a sale for them.




Google says it doesn’t sell your personal info to third parties. While you would be well within your reason to suspect this isn’t true, it is actually legally relevant because it means, as a consequence, Google doesn’t provide a “do not sell my personal information” opt-out link which would otherwise be required by California law (where Google is headquartered).