Not to defend Google because they violate privacy in many ways, but they absolutely do not share that level of data with partners. This is not some ethical decision. The data is just far too valuable to Google. Google is extracting as much value as they can from users, advertisers, and publishers, and if they sold access to the data itself, publishers and advertisers could begin cutting out Google. Instead Google gives advertisers a lot of control over what users to target, and uses the data inside a black box to show those ads.

Google is hoarding your data and using it to show you ads with minimal built-in opt-outs. But they aren’t sell your data.