Background music usually refers to a kind of music used to adjust the atmosphere in TV series, movies, animations, video games and websites. When it is inserted into the dialogue, it can enhance the expression of emotions and achieve an immersive audience experience. In addition, music played in some public places is also called background music.

Background music is often used in shopping malls, schools, squares, conferences, bars and other public places. Using music to set off the atmosphere, or brewing emotions, or expressing behavior, can have a good effect, so that the atmosphere of the environment meets the needs of the occasion.

For example, grand marches are suitable for the beginning and end of meetings, while dynamic music is suitable for shopping malls and so on.

Background music is not directly related to the subject's conscious behavior, but indirectly affects the subject's conscious behavior through the medium of non-music appreciation environment.