A composer creates music. They may write original pieces or arrange existing music in a new way. Composers often have a deep understanding of music theory and possess the ability to translate their musical ideas into written notation. They may work in a variety of genres, including classical, jazz, pop, and electronic music. Composers can work independently, collaborating with musicians and performers to bring their creations to life. They may also work in a variety of contexts, such as film, television, theater, and video games.