2, dreaming has many benefits for people, dreaming can exercise the function of the brain. Dreaming is a working procedure of the human brain. By sorting out the information received by the brain during the day, the information that the brain can't process during the day can be well processed in the dream, and the problems that can't be solved by hard thinking during the day can be solved in the dream at night. According to the EEG test, it is also found that the activity of human brain is quite intense when dreaming. We can detect fast and disordered brain waves from dreaming, and its intensity sometimes exceeds that when awake. From this perspective, dreaming is a self-need to exercise the function of the human brain.