A Master Use License is a legal agreement that allows a person or organization to use a specific piece of music in a project, such as a film, television show, or advertisement. This license is typically obtained from the owner of the recording, which could be a record label or the artist themselves. It ensures that the rights to use the music are secured, often for a fee. This type of license is distinct from a Synchronization License, which covers the use of the underlying composition or song. Both licenses are essential for legally incorporating music into visual media, protecting the rights of the creators involved.