The purpose of a fitness or health tracker is to monitor and provide data on various aspects of an individual's physical activity and health metrics. These devices can track metrics such as steps taken, heart rate, calorie expenditure, and sleep patterns. By offering insights into daily behavior, trackers help users set fitness goals and hold themselves accountable. The collected data fosters awareness of lifestyle choices and motivates individuals to engage in healthier habits. Additionally, health trackers can assist in identifying patterns, allowing for informed decisions to optimize overall well-being.