My question is more towards how this is implemented. I mean do they expose apis to each other or store data at a common place to be accessed by others. Please excuse me if it seems too naive.
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1ad networks and cookies that are shared between apps – schroeder Jan 18 '21 at 11:39
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The apps do not share information. They use an ad network to display ads to users. Many apps will use the same networks, and those networks are also used by websites, so the network knows the user's behaviours on the apps and the websites that use them. That way the network shows relevant ads to users.
The apps and websites don't actually know what ads are being shown to users.
schroeder
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