What is the significance of duplets in music and how do they affect the overall rhythm and structure of a musical composition?

Duplets in music are pairs of notes played in the space of three, creating a sense of tension and rhythmic interest. They can add complexity to the rhythm and structure of a composition by breaking away from the regular beat and creating a sense of syncopation. This can add excitement and variation to the music, making it more dynamic and engaging for the listener.