The DHT11 sensor is a low-cost, easy-to-use device that measures both temperature and humidity. It is widely used in DIY electronics, educational projects, and hobbyist applications due to its simplicity and reliability. The sensor provides digital output, making it straightforward to connect with microcontrollers like Arduino or Raspberry Pi. While not as precise as some advanced sensors, the DHT11 is popular for basic environmental monitoring tasks where high accuracy is not critical. Its compact size and affordable price make it a favorite choice for beginners learning about environmental sensing and data collection.