The tutorial provides a comprehensive guide on setting up mobile push notifications for both iOS and Android using React Native and PubNub, detailing the installation of necessary software including React Native, Node, and Watchman, and the configuration of development environments with Xcode for iOS and Android Studio for Android. It outlines the process of creating a new React Native project, integrating the PubNub React V4 SDK, and configuring push notifications by obtaining and setting up unique keys from the PubNub Admin Dashboard. The guide also addresses the integration of iOS and Android push notifications through specific configurations in each platform's respective development environment, detailing steps for registering devices, managing notification events, and testing notifications using physical devices and virtual simulators. The tutorial concludes by highlighting the benefits of mobile push notifications for brands, offering troubleshooting resources, and inviting feedback from users.