1. Global marketing professionals welcome Apple's decision to maintain the IDFA in iOS 14 while also introducing new privacy features. 2. However, they have concerns about Apple's new mandatory IDFA opt-in pop-up for apps, including that it does not comply with GDPR consent requirements, is not interoperable with existing digital advertising standards, and could negatively impact app publisher revenues. 3. They urge Apple to ensure the pop-up can be customized, is interoperable with standards like the IAB Europe's Transparency & Consent Framework, and to conduct an impact assessment before implementing iOS 14 updates.