This project demonstrates how to implement IoT push notifications by sending messages from an Arduino Node MCU (ESP8266) to an Android smartphone using Firebase Cloud Messaging (FCM). It integrates IoT and mobile ecosystems, enabling a smart object to trigger real-time notifications on a mobile device when specific events or alerts occur. The repository provides a practical example of connecting hardware to cloud services for remote alerting. Common use cases include security alerts, sensor threshold breaches, home automation triggers, and any scenario where a connected device needs to inform a user instantly on their phone. A video tutorial is available for step-by-step guidance.