A fitness tracker is a device that monitors and records various physical activities, helping users maintain a healthy lifestyle. These devices can track metrics such as steps taken, heart rate, calories burned, and even sleep patterns, providing valuable insights into one's fitness journey. Popular brands include Fitbit and Garmin, which offer a range of features tailored to different fitness levels. Fitness trackers often sync with smartphones, allowing users to analyze their data through dedicated apps. This connectivity enhances motivation by enabling users to set goals, join challenges, and share progress with friends. Overall, fitness trackers serve as a personal coach, guiding individuals towards better health.