Apple's new IDFA policy in iOS14 will make advertisers' life much more difficult as they will potentially loose the ability to track a lot of details about the history, demographic details and user actions. Good CRMs and marketing automation tools can help counteract the impact of the changes that iOS14 will bring.
See full details on Mediapost Martech's blog: https://blog.mediapost-martech.com/how-good-crms-and-marketing-automation-will-help-lower-the-impact-of-new-ios-14-policies