What is the Notification Summary on iPhone?

How can I configure a Notification Summary? What information does Notification Summary show?

iOS 15 and later

The Notification Summary provides a consolidated list of unread notifications on devices running iOS 15 and later. The feature can be enabled from Settings -> Notifications -> Scheduled Summary.

To reduce unwanted or low-priority notifications throughout the day, they are instead lumped together for later browsing.

Once enabled, the Notification Summary can be set with the following options:
  • Frequency of delivery
  • Times of delivery
  • Apps included in summary