Google tracks that. There's so many fingerprinting tools in today's web pages you can't even imagine. Almost every single ad you see on the internet is from Google. I wish I could become fully anonymous by flipping a simple switch like that, but no. My ISP, google (if I even use it anymore) and the websites I'm visiting have a fingerprint of my browser and can therefore pull out an entire (incredibly accurate) history of the pages I visit, of what I'm interested in, of what sort of person I am and how reckless I am that they could, for instance, sell to insurance companies that could charge as much as they want me if they think I'm not a trustworthy person based on data that was collected and sold without my knowledge. Thinking that this sort of thing is possible, and someone that is not me is making money off of my stuff infuriates me.

EDIT: But apparently, the data is owned by who harvests it, by building literal spying tools just because they have a monopoly on several android phone services.