A Boolean value that indicates whether the user has limited ad tracking.
- iOS 6.0+
- macOS 10.14+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
Check the value of this property before performing any advertising tracking. If the value is
false, use the advertising identifier only for the following purposes: frequency capping, attribution, conversion events, estimating the number of unique users, advertising fraud detection, and debugging.