In the new iOS 6 Apple has implemented a function called Limit Ad Tracking, but it was not explained in any way in the conference that took place last night in San Francisco. Those who discovered it did not know what use it had, but Apple explains in the iOS settings menu that through the system it tries to prevent advertisers from identifying users and their iDevices when they browse the Internet. Apple said it would stop providing information about UDIDs, and it did this for advertisers Advertising Identifier which does not provide personal information about the user and has a temporary character, so the advertiser will not be able to identify the terminal after a certain period of time.
iOS 6 introduces the Advertising Identifier, a non-permanent, non-personal, device identifier, that advertising networks will use to give you more control over advertisers' ability to use tracking methods. If you choose to limit ad tracking, advertising networks using the Advertising Identifier may no longer gather information to serve you targeted ads. In the future all advertising networks will be required to use the Advertising Identifier. However, until advertising networks transition to using the Advertising Identifier you may still receive targeted ads from other networks.
Through this system, Apple is trying to force advertisers to stop serving targeted ads for each individual user, but for now the applications must be updated to use the system. Until they are updated, we will continue to be monitored, but I assume that at some point Apple will decide to withdraw from the App Store the applications that do not use the system, forcing everyone to implement it. In essence, Apple is trying to make us anonymous in front of advertisers, and of course this is not in the interest of those who sell advertising.
