How does mqtt communication help reduce bandwidth usage for large IoT sensor networks?

Example Concept: MQTT uses a publish/subscribe architecture where devices (clients) publish messages to a broker on specific topics. Other devices subscribe to these topics to receive updates. This model reduces bandwidth usage by ensuring that messages are only sent and received when relevant, avoiding the need for continuous polling or direct device-to-device communication. The protocol's small header size further minimizes data overhead, making it ideal for constrained networks.