iOS 15 is the latest operating system for Apple's mobile devices, and it comes with a significant update to push notifications. For mobile marketers, understanding the changes and how to optimize push notifications for iOS 15 is crucial to reaching and engaging with users effectively.

The update to push notifications in iOS 15 includes new features such as notification summary, focus mode, and time-sensitive notifications. Notification summary groups together non-urgent notifications and delivers them at a convenient time for the user, reducing notification overload. Focus mode allows users to choose which apps and contacts can send notifications during designated times, ensuring they only receive important notifications. Time-sensitive notifications are designed to grab the user's attention immediately, even if their device is in silent or do not disturb mode.