Monitoring heart rate during exercise serves several purposes. It helps individuals gauge the intensity of their workout, allowing for optimal training levels and ensuring exercises are effective. Maintaining the heart rate within targeted zones can improve cardiovascular fitness, boost caloric expenditure, and enhance performance. Furthermore, tracking heart rate enables individuals to prevent overtraining and manage recovery periods. Knowing one's heart rate can also aid in identifying any potential health issues, making it an essential tool for fitness enthusiasts, athletes, and those beginning an exercise program.