Comment by hedora

They still have facial recognition feeds, car feeds, and they purchase data from third-party consumer surveillance firms, including credit card purchase histories for non-Google users. You don't need to have a Google account to be tracked by AdWords, and there's no practical opt-out, other than staying logged in all the time, and then being tracked in other ways, and agreeing to all sorts of things in their (ever-changing) EULA.

https://epic.org/documents/google-purchase-tracking/

I'm sure they have other programs I haven't heard of.