How is push notification delivery via Apple Push Notification Service (APNs) organized?

Delivery of push notifications via Apple Push Notification Service (APNs) occurs as follows:

1. The app registers with APNs and receives a unique device token.
2. The app server sends a notification to the APNs server, including the device token and notification content.
3. APNs receives the notification and places it in the delivery queue.
4. APNs establishes a connection with the device and delivers the notification.
5. The device receives the notification and displays it to the user or processes it in the background.

It is important to note that APNs acts as an intermediary between the app server and the device, ensuring reliable and secure delivery of notifications.