A publishing deal is an agreement between artists and publishing companies. The company can claim your work, in exchange for promoting it. From here, the deal tends to go in a number of directions, however, we will only address the bare bones. Publishing companies control several aspects of your work:
Performing Acts Rights – Royalties gathered from radio and digital streaming services.
Mechanical Rights – Royalties gathered when an artist covers one of your songs.
Synchronization – Royalties gathered when the song is played in commercials, movies or television.
Sheet Music – Royalties gathered when sheet music of a song sells.