A sleep tracking device is a gadget that helps you monitor how you sleep. It records data such as how long you sleep, how deep your sleep is, and how often you wake up. This information allows you to understand your sleep better and make changes to improve it. In this article, we will explore the working, benefits, features, and future of sleep tracking devices in simple language. By the end, you will know why these devices are becoming popular and how they can help you live a healthier life.