Sleep is important for everyone, whether they’re a person or an animal. All need to sleep sometime during the day. There are three types of sleep stages: first is light sleep, deeper sleep, and deepest sleep. All stages depend on a person’s mentality, like stress, pressure, tension, etc. After all, if you can’t able to sleep at any time, then that may build a problem in your body. In that situation, you need to take medicines like Belsomra and Ambien to get a deep sleep.