Apple already has this information, so this is only putting it to use. Plus, they continue below: > Advertisers have the ability to select user segments based

Apple already has this information, so this is only putting it to use. Plus, they continue below: > Advertisers have the ability to select user segments based on this information when setting up their campaigns to guide the delivery of their ads. However, no user segment can be smaller than 5,000 people. No individual user data may be exported from Search Ads, ensuring that only aggregate campaign delivery information is available and no individual user data is ever exposed to advertisers. So individual developers don't have access to this information.