
Push notifications are an essential part of mobile apps that if used properly can be a great channel for consumer interaction and engagement but there are also times when overenthusiastic businesses turn them into a source of annoyance for users.
The complex technologies and processes underlying those notifications?
GCM is a Google Play service used by a majority of applications for serving push notifications to Android devices.
For instance, if the users open the notification on one device, it would disappear from all of their devices.
The Android device sends a sender ID and application ID to GCS server
After registering the device, it issues a registration ID to the device