An IoT Device (Internet of Things Device) is a physical object that connects to the internet and can collect, send, or receive data. These devices can range from everyday items like smart thermostats and fitness trackers to industrial machines. They often use sensors to gather information about their environment and can be controlled remotely through applications or web interfaces. The main purpose of IoT devices is to improve efficiency and convenience in various aspects of life. For example, a smart home system can automate lighting and heating, while wearable technology like smartwatches can monitor health metrics.