IoT sensors are small devices that collect data from the environment and send it to the internet. They can measure things like temperature, humidity, light, and motion. These sensors are used in various applications, such as smart homes, where they help control heating and lighting, or in agriculture, where they monitor soil conditions to improve crop growth. By connecting to the Internet of Things (IoT), these sensors enable real-time monitoring and automation. This means that users can receive alerts on their smartphones or computers, allowing them to make informed decisions quickly. Overall, IoT sensors play a crucial role in making our lives more efficient and connected.