MQTT is a lightweight messaging protocol designed for low-bandwidth, high-latency, or unreliable networks, commonly used in IoT (Internet of Things) applications. It allows for efficient and reliable message transmission between devices.

Here's a breakdown of the term:

• Message: Refers to the payload (data) being transmitted.
• Queuing: Refers to the way messages are stored and handled by brokers in MQTT.
• Telemetry: Refers to the collection and transmission of data from remote or embedded devices.

Thus, MQTT stands for Message Queuing Telemetry Transport.