Wearable sensors are small electronic devices that can be worn on the body to monitor various health and fitness metrics. These sensors can track activities like heart rate, steps taken, and sleep patterns, providing valuable data to users. They are often integrated into items like smartwatches, fitness bands, and even clothing. These devices use technologies such as Bluetooth and Wi-Fi to connect to smartphones or computers, allowing users to analyze their data through apps. Wearable sensors are increasingly popular for promoting health awareness and encouraging active lifestyles, making it easier for individuals to manage their well-being.