According to paragraph 2, what is the main purpose for using background music?

* Hướng dẫn giải

Dẫn chứng: The importance of background music and sound effects for your explainer video, therefore, cannot be overstated. You may not need a full blown orchestra or classy jazz tones to create the mood, but whether going for a subtle effect, a professional demonstration or simply trying to attract customers, music is a must.