[hyperman1]

It isn't even usefull for advertising.

Google keeps giving me french ads even when I speak dutch, live in the dutch half of Belgium, and have a http request header saying i speak dutch or english. I get ads for all kinds of stuff I don't care about. In fact, I get ads for things I can't even buy in my country or continent if I wanted it. If google would tune their ads to the language i ask them, based on the query I entered, the results would be a lot better.

I presume the real value of all this tracking is they can companies to buy ads with them, even if the actual ad delivery mostly fails.

Now I bought a rubber mat on ali express, for opening all kinds of electronics. For weeks they tried to sell me rubber ... stuff ... and latex ... stuff ... and other related ... stuff .... until my wife started mocking me enough to stay of their site for a few months. That's another cost of relevant advertising ;-)

[unnouinceput]

Why you even getting ads in the first place? Never heard of uBlock Origins? Stop using Chrome, use Firefox. Then you can put safely Origins on both mobile and desktop for Firefox and never see any ads.

[summerlight]

Your issue is ad targeting, and most of it is done manually by advertisers. Ironically, this shows why ad targeting can be done much better at the hands of Google and Facebook because they can track the user behaviors more accurate than advertisers.

[iamstupidsimple]

Ad targeting is done by the buyer. They're probably setting location but not language. This happens all the time.