FCM (Firebase Cloud Messaging) is a cross-platform messaging approach that allows app developers to send notifications and messages to their users. FCM is the successor to Google Cloud Messaging (GCM), which was deprecated in 2019.

FCM provides a reliable and secure messaging platform that can be used to send messages to Android, iOS, and web applications. FCM uses a combination of Firebase Cloud Messaging and Google Cloud Messaging to deliver messages to the appropriate devices.

To use FCM, app developers must first create a project in the Firebase console and configure their app to us