Political songs that advocate for or praise revolutions are known as revolutionary songs or Viplava Ganam. They're used to boost morale and for political propaganda and agitation. Many protest songs have the potential to be revolutionary, or to be canonised as viplava ganangal after a successful revolution. Some aspects of protest song, on the other hand, may be considered counter-revolutionary once a revolution has been established. Propaganda often includes revolutionary songs or Viplava Ganangal. Singing such songs is frequently regarded as a revolutionary or demonstrative act. Such songs have been known to bring disjointed political communities together. Some revolutionary songs have emerged spontaneously, while others, such as Bertolt Brecht's, have been written by well-known authors. Songs about revolution are frequently directed at specific governments.