A concerto is a musical composition typically written for a solo instrument accompanied by an orchestra. It usually consists of three movements: fast, slow, and fast again. The soloist showcases their technical skill and expressiveness, while the orchestra provides a rich backdrop, creating a dialogue between the two. The term is often associated with classical music and has been popular since the Baroque period, with composers like Johann Sebastian Bach and Antonio Vivaldi contributing significantly to the genre. Concertos can feature various instruments, including the piano, violin, and cello, each bringing its unique character to the performance.