An "Original Soundtrack" (OST) is a collection of music specifically created for a film, television show, video game, or other media. It typically includes songs and instrumental pieces that enhance the emotional and narrative aspects of the production. The OST can feature both original compositions and existing songs that fit the theme of the project. The music in an OST is often composed by a film composer or a music producer, and it plays a crucial role in setting the tone and atmosphere. Soundtracks can be released as albums, allowing fans to enjoy the music outside of the media it was created for, and they often contribute to the overall popularity of the project.