Using audio editing to clean up your tracks can make everything sound much more professional. We don't want hum from guitars or mouth noises from the singer in the middle of a dramatic piano part.
We want clean audio, free from background noise and un-professional lip smacks.
Read here below to see and hear the incredible difference in professionalism we can get just by cleaning up our audio tracks.
Compare these examples here below. In this track we have an acoustic guitar part that has some background noise. It's not edited correctly nor has any fades. Therefore we hear background noise(which is me, moving around) before the guitar part starts. For the full effect of how it sounds, I recommend using headphones.