I baked cookies!
HAPPY BIRTHDAY Ancient Hippy!!!! Pizza and sugary things all around for you!
One use is entertainment, who hasn't indulged in that?
Another is for ambience, its been used to the set the tone for restaurants, religious gatherings, or just about any other human gathering since the earliest parts of history.
Music is for expressing feelings and emotions that people have or that may not otherwise get expressed without it (with just mere words); to transcend words.