Fortissimo is a musical term that indicates a passage should be played very loudly. It is often abbreviated as "ff" in sheet music. This dynamic marking helps musicians understand the intended volume and intensity of a piece, contributing to the overall emotional expression of the music. In orchestral compositions, fortissimo can create powerful moments, drawing the listener's attention. Composers like Ludwig van Beethoven and Richard Wagner frequently used fortissimo to enhance climactic sections of their works, showcasing the full strength of the orchestra and engaging the audience with dramatic sound.