In what was is Google a data broker? Where can you buy this data?
https://support.google.com/waymo/answer/13381216?hl=en
"Waymo may disclose user personal information to third parties to tailor advertising and offers to your interests. Such disclosures may be considered “sales” or “sharing” of personal information under the California Consumer Privacy Act."
It is rather surprising that so many here downvote the obvious, which even non-technical Guardian journalists have found out.
As far as I understand the advertising model is the same as with Google Ads - Google builds profiles and lets advertisers target users based on profiles. They do not sell user data, and I'm not personally aware of a case where Google has even been alleged to be selling user data.
https://www.dli.tech.cornell.edu/post/facebook-and-google-ar...