The primary purpose of a fitness tracker is to monitor and analyze various aspects of physical activity and health metrics. These devices can track parameters such as steps taken, heart rate, calories burned, sleep quality, and exercise duration. By providing real-time data, fitness trackers help individuals set goals, stay accountable, and motivate continuous physical activity. The data collected can also guide users in creating more effective workout plans tailored to their specific fitness levels and objectives. Overall, fitness trackers serve as useful tools for enhancing self-awareness and improvement in overall health and fitness.