A DJ, or disc jockey, is a music artist who specializes in selecting and playing recorded music for a live audience. DJs are often associated with events such as nightclubs, festivals, weddings, parties, and other social gatherings where music is played to entertain and get people dancing. The primary role of a DJ is to create an appropriate musical atmosphere for the occasion by selecting songs, mixing them smoothly, and broadcasting them through sound equipment.

DJs typically use turntables, CD players, DJ controllers, or computer-based mixing software to manipulate and mix music in real-time. They also have the ability to add special effects, sync tempos, and create seamless transitions between tracks to maintain the energy on the dance floor. Some DJs also create their own original music or remix existing tracks to add their personal touch to their sets.

DJs can have a wide range of musical styles, from electronic music (such as house, techno, trance) to hip-hop, reggae, Latin music, rock, and more. Their job is to adapt to the audience and create a memorable music experience for those listening.