A wearable device is a technology that can be worn on the body, often in the form of accessories like watches, bands, or glasses. These devices are designed to monitor various aspects of health and fitness, such as heart rate, steps taken, and sleep patterns. Popular examples include smartwatches and fitness trackers. Wearable devices often connect to smartphones or computers, allowing users to track their data over time and receive notifications. They can also include features like GPS for navigation and apps for various functions, enhancing the user experience and promoting a healthier lifestyle.