The text discusses the integration of Google Cloud Messaging (GCM) and PubNub for developing real-time mobile applications on Android, particularly focusing on facilitating push notifications. It highlights the benefits of using GCM, such as eliminating the need for developers to manage the complexities of creating a push notification system, as Google handles queuing and message delivery even when devices are offline. The integration with PubNub further simplifies the process by replacing third-party servers, allowing developers to leverage PubNub's real-time data streams alongside GCM's notification capabilities. The article provides a step-by-step guide on setting up a project using GCM and PubNub, detailing the registration process in Google's Developer Console and obtaining the necessary keys from PubNub's Admin Dashboard. It emphasizes the simplicity and efficiency of combining Google's native Android Notification API with PubNub's network, enabling seamless push notification delivery to Android devices.