iOS 15 Push Notification features provide exciting opportunities for mobile marketers to engage with users to improve engagement and ROI.

Finally, iOS 15 introduces a new type of notification called "Critical Alerts," which can bypass the user's Do Not Disturb and Silent modes. These alerts are reserved for emergencies, such as natural disasters or medical emergencies, and can only be sent by authorized apps. This feature ensures that users receive critical information when they need it most and helps to keep them safe in emergencies.

Overall, the changes to push notifications in iOS 15 represent a significant shift towards user privacy and a more streamlined notification experience. Mobile marketers will need to adapt their strategies to ensure that their notifications are still relevant and engaging while respecting user privacy preferences.