Sound Design refers to the art of creating and manipulating sound for a film or video production. This involves selecting and recording sound effects, dialogue and music, as well as editing and mixing these elements to create a cohesive soundtrack. Sound designers work with directors to establish the right audio tone and atmosphere for each scene, which can include ambient sounds like traffic or birds, sound effects like rain or explosions, and music to build tension or set mood. A strong sound design can immerse audiences and bring the world of a film or video to life.