What is the primary job of a dj?

Disc Jockeys or DJs are required to play musical recordings in parties or events. Roles of these professionals vary depending on the purpose or the setting of the music. They may work for radio stations where they play musical selections from playlists. Among genres played by DJs are classic rock, heavy metal, adult contemporary, light rock, jazz, country western, gangsta rap, hip hop, among other music styles.