Firebase push notifications are a way to send notifications to an Android or iOS app. They can be used to deliver important information to users, such as updates, alerts, and promotions. Firebase provides a cloud messaging service that allows you to send push notifications to your users.

To send a push notification using Firebase, you need to do the following:

1. Set up a Firebase project: Go to the Firebase console and create a new project.
2. Add Firebase to your Android or iOS app: Follow the steps in the previous answers to add Firebase to your app.
3. Create a notification: Use the Firebase console or the Firebase API to create and send a notification to your users. You can specify the notification’s title, body, and target audience (such as a specific group of users or a topic).
4. Set up a service to handle incoming notifications: In your app, create a service that extends “FirebaseMessagingService” and overrides the “onMessageReceived” method. This method will be called when the app receives a push notification.

That’s it! You have now successfully set up Firebase push notifications for your app. Your users will receive the notification on their devices when they have the app open or in the background.