I think that this songs purpose is to let people say what they want to say about you and just let them be. I think this because during the course it says "Say what you wanna say! And let the words fall out, Honestly i wanna see you be brave." This shows that you shouldn't worry about what somebody else says and worry about what you have to do because it says I wanna see you be brave. The word "Brave" represents take the pain and move on to a place where you don't have to worry about the rude comments somebody else says.