I don’t really know anything about buying data or whatever, but how would you actually go about buying my day-to-day movements and how much does it actually cos

I don’t really know anything about buying data or whatever, but how would you actually go about buying my day-to-day movements and how much does it actually cost? I was always under the impression that when people say ‘Google collects all your data and sells it’, or whatever, they really mean that google sells ads which may be targeted based on the data they collect, and it’s only small companies with much less data who might sell it.