Notifications are essential to enhancing the mobile experience by boosting user engagement and retention, but managing notifications across different platforms can be complex. While developers can choose to build their own notification systems, using a library like react-native-push-notification is often more efficient, as it supports both local and push notifications across Android and iOS through a platform-independent approach. This library is favored for its comprehensive documentation, extensive features, and ability to simplify the integration of notifications, despite the inherent complexity of managing different APIs and mechanisms for Android and iOS. Other libraries such as react-native-notifications, react-native-onesignal, and react-native-root-toast offer varying degrees of specialization and platform-specific features, but react-native-push-notification remains the most popular due to its balance of features and support, making it ideal for most React Native applications.