Smart bands are wearable devices that track various health and fitness metrics, such as heart rate, steps taken, and sleep patterns. They often connect to smartphones via Bluetooth, allowing users to monitor their data through dedicated apps. Many smart bands also feature notifications for calls, messages, and other alerts, making them convenient for daily use. These devices come in various styles and price ranges, catering to different preferences and needs. Some popular brands include Fitbit, Garmin, and Xiaomi. Smart bands are designed to encourage a more active lifestyle by providing insights into personal health and fitness goals.