Example Concept: MQTT provides three Quality of Service (QoS) levels to manage message delivery: QoS 0 (At most once) delivers messages with no guarantee of receipt, suitable for non-critical data; QoS 1 (At least once) ensures that a message is delivered at least once but may be duplicated; and QoS 2 (Exactly once) guarantees that each message is received only once by the intended recipient, providing the highest level of delivery assurance. These levels allow MQTT to adapt to varying network conditions, balancing between delivery reliability and resource efficiency.