Machine-to-Machine (M2M) refers to the direct communication between devices without human intervention. This technology allows machines to exchange data and perform tasks automatically, enhancing efficiency in various industries. For example, smart meters in homes can send energy usage data to utility companies, enabling better resource management. M2M is commonly used in sectors like healthcare, transportation, and manufacturing. In healthcare, devices can monitor patients' vital signs and send alerts to medical staff. In transportation, GPS trackers can provide real-time location data for fleet management, improving logistics and reducing costs.