What is FCM backend?

Firebase Cloud Messaging (FCM), formerly known as Google Cloud Messaging (GCM), is a cross-platform cloud solution for messages and notifications for Android, iOS, and web applications , which as of 2021 can be used at no cost.

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Does Firebase have a server?

The server side of Firebase Cloud Messaging consists of two components: The FCM backend provided by Google. Your app server or other trusted server environment where your server logic runs, such as Cloud Functions for Firebase or other cloud environments managed by Google.

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What is a push notification image?

On Android, web push notifications look like any other mobile notifications . On desktop, the aspect of the notifications may change depending on your users’ browser and OS: Windows: Images will be displayed exclusively for Chrome. This also applies to any chromium-based browser (e.g. Microsoft Edge, etc).

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What is Android payload notification?

Notification messages with optional data payload When in the background, apps receive the notification payload in the notification tray, and only handle the data payload when the user taps on the notification . When in the foreground, your app receives a message object with both payloads available.

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