Health and fitness trackers are devices or applications designed to monitor and record various aspects of physical activity and health. They can track metrics such as steps taken, heart rate, calories burned, and sleep patterns. Many trackers sync with smartphones, allowing users to view their data and set fitness goals. These devices come in various forms, including wristbands, smartwatches, and mobile apps. Popular brands include Fitbit, Garmin, and Apple Watch. By providing insights into daily habits, health and fitness trackers can help individuals make informed decisions about their lifestyle and improve overall well-being.