They can cross reference one's data across all their services.
So, let's say your Android phone let's Google know where you live, work and hang around by checking maps history and gps records, and they accumulate all the search words and they know who you are, really and check every email for finding who is related and they can really come up with a model of what kind of person you are at any specific moment.
Group together, see what the citizens are like in a certain area, I think that alone is already valuable for targeting.
And they surely randomly get hidden gems where it can't possibly go public but use for their own merit.
But that's not what I asked. Let's assume for a moment that you trust google completely, and believe that they won't do anything untoward with your data on their platform. But we all know that google gives some data to advertisers. I'm asking what you think that data is, hence I asked
>I'm just curious, what data do you believe google gives to advertisers?
It sounds like you're saying that Google has a lot of information on you, which is probably true, but how much of that gets given to third parties? (and if you're claiming that the information you described is given to third parties, I'm confident that you're mistaken).
They can cross reference one's data across all their services.
So, let's say your Android phone let's Google know where you live, work and hang around by checking maps history and gps records, and they accumulate all the search words and they know who you are, really and check every email for finding who is related and they can really come up with a model of what kind of person you are at any specific moment.
Group together, see what the citizens are like in a certain area, I think that alone is already valuable for targeting.
And they surely randomly get hidden gems where it can't possibly go public but use for their own merit.