Dj-ing involves mixing different types of music to please crowds. There are two main types of DJs: disc jockeys who play and remix songs live using records or discs, and digital jockeys who solely use digital remixing live or for events. The document provides examples of popular DJs like DJ Nyk from Delhi and DJ Shadow from Dubai, and discusses software like FL Studio 10 that DJs use to create remixes and mixes.