Apple today previewed powerful new privacy protections in iOS 15, iPadOS 15, macOS Monterey, and watchOS 8, which help users better control and manage access to their data. These features represent the latest innovations in Apple’s legacy of privacy leadership, as the company has continually expanded its commitment to privacy and encouraged change across the industry with features like App Tracking Transparency and Privacy Nutrition Labels on the App Store.

This is probably the most important thing Apple announced at WWDC21. Go to Apple’s site and read it all.