We can say what most things are used for without much trouble, but what about art?
If you scratch your head of feel vague and uncomfortable answering this question, take a look at this animated video by philosopher Alain de Botton, who will give you five actual things that art does for humanity. If you like pretty pictures, but feel reluctant to just say, “Well, I like pretty pictures,” Alain has you covered for that.
Alain de Botton answers this question in a short video here.