Apples App Tracking Transparency changed a lot. Whats IDFA, what’s IDVF? Learn more in this post at medium.com:
What is App Tracking Transparency and IDFA?
Starting with the launch of iOS 14.5, apps have to request authorization from the user in order to access the Identifier For Advertiser (IDFA) of the device (opt-in). Until now, access to IDFA was allowed by default (opt-out). This has a big impact on the app ad and attribution industry.
Learn more in my blog post on the inovex website: