Message Queuing Telemetry Transport (MQTT) is a lightweight messaging protocol designed for low-bandwidth, high-latency, or unreliable networks. It enables devices to communicate efficiently by using a publish-subscribe model, where clients can send messages to a central broker, which then distributes them to subscribed clients. This makes it ideal for applications in the Internet of Things (IoT), where many devices need to exchange data. MQTT operates over the TCP/IP protocol, ensuring reliable message delivery. It supports various quality of service levels, allowing users to choose the balance between message delivery assurance and network efficiency. Its simplicity and low overhead make it suitable for resource-constrained devices.