Azure IoT Hub is Microsoft’s cloud service for connecting, managing, and monitoring IoT devices at scale. It supports multiple protocols, including MQTT, AMQP, and HTTPS, providing flexibility for different device capabilities. IoT Hub enables bi-directional communication between devices and the cloud, allowing both telemetry and remote control. It integrates with other Azure services, such as Event Grid, Functions, and Stream Analytics, for powerful IoT workflows. IoT Hub also offers strong security, with per-device authentication and access control. It is widely used in industrial and enterprise IoT projects.