What is dramatic significance of song in Waiting for Godot?

The song "Nothing to be Done" in Waiting for Godot by Samuel Beckett serves to highlight the monotony and futility of the characters' existence. It reflects their sense of hopelessness and the repetitive nature of their lives as they wait for someone who may never come. The song adds to the overall sense of existential despair and the inability to find meaningful purpose in their waiting.