IoT sensors have become increasingly significant in various industries due to their ability to collect data from the environment or equipment and communicate with systems for real-time monitoring and automation. These smart sensors typically consist of a sensor that captures data, a microprocessor that analyzes the output via an algorithm, and communication resources that enable action. The most commonly used types of IoT sensors include motion sensors, proximity sensors, accelerometers, pressure sensors, infrared sensors, temperature sensors, and humidity sensors. These sensors have various applications in home automation, healthcare, industrial manufacturing, environmental monitoring, and agriculture, enabling better control, monitoring, and automation. As technology advances, more use cases will emerge, leading to a greater impact on industries and creating new opportunities for innovation.