Push Notifications are the main source of getting the user's attention to an important event that occurs in the app such as receiving a message or payment. They play a vital role in the apps conversion rates. Push notifications in react native can be accomplished with the help of many packages. OneSignal is one of them. I find it easy to configure than other packages. OneSignal can be used to send push notifications in Android, iOS & web. OneSignal is free to use.