MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol that enables the simple and efficient exchange of data between devices. It provides a reliable, low-cost, and low-power way to connect devices over networks, making it an ideal technology for the Internet of Things (IoT). MQTT is an open protocol that is easy to use and implement, making it popular with developers working on IoT applications. With MQTT, developers can quickly and easily set up communication between devices, ensuring reliable and secure message delivery. The protocol is also highly efficient, making it great for applications that require low latency or high throughput. MQTT is a great choice for developers looking to create connected devices and applications quickly and efficiently.