The main characteristic of IoT (Internet of Things) devices is their ability to connect, communicate, and share data with other devices and systems over the internet. These devices range from everyday household items like smart thermostats and appliances to complex industrial sensors. IoT technology enables real-time monitoring and control, leveraging data analytics to optimize processes and improve efficiency in various sectors, such as healthcare, manufacturing, and urban planning. The interconnectedness of IoT devices facilitates seamless automation and enhances decision-making based on data-driven insights.