Apple’s iOS6 will track pretty much every detail of your online activities. The new tracking technology Apple is using, called IFA or IDFA (Identifier for Advertisers) doesn’t identify you personally. It just provides data that advertisers can use to send relevant ads to the right devices. Privacy advocates say IFA is still not without risk because the information being collected could be misused and abused. Apple does not promote IFA on its launch page about “What’s New” with iOS 6.”]
Source: https://www.csoonline.com/article/2132424/with-ios-6–apple-tracking-is-back.html