Fitness monitors are wearable devices that track various physical activities and health metrics. They often measure steps taken, distance traveled, calories burned, and heart rate. Many fitness monitors also include features like sleep tracking and reminders to move, helping users maintain an active lifestyle. These devices can sync with smartphones and apps, allowing users to analyze their data over time. Popular brands include Fitbit, Garmin, and Apple Watch. Fitness monitors are useful tools for individuals looking to improve their fitness levels and overall well-being by providing insights into their daily activities.