The conclusion or (in popular-music terminology) outro of a song is a way of finishing or completing the song. It signals to the listeners that the song is nearing its close. The reason for having an outro is that if a song just ended at the last bar of a section, such as on the last verse or the last chorus, this might feel too abrupt for listeners. By using an outro, the songwriter signals that the song is, in fact, nearing its end. This gives the listeners a good sense of closure. For DJs, the outro is a signal that they need to be ready to mix in their next song.
