The purpose of machine-to-machine communication in IoT is to enable devices to exchange data and interact automatically without human intervention. This communication forms the backbone of smart systems, allowing interconnected devices to collaborate, improving operations and efficiency. For instance, sensors can send real-time data to cloud servers, which then analyze the data and trigger actions in other machines or systems, enhancing automation. This interconnectivity supports various applications, from smart homes to industrial automation, enabling better monitoring, control, and optimization of resources.