What is the effect of the willow song and the interruptions to it?

The willow song in Shakespeare's "Othello" symbolizes themes of love, loss, and melancholy, reflecting Desdemona's emotional state as she faces betrayal. Its interruptions serve to heighten the tension and foreshadow the tragic events that unfold, emphasizing the disruption of harmony in her life. These breaks also represent the chaotic forces of jealousy and manipulation at play, ultimately leading to the song's poignant association with impending doom. Overall, the interruptions deepen the emotional impact of the song and underscore the fragility of Desdemona's situation.