A DJ wedding checklist is important because it ensures that all the important tasks related to the music for the wedding are taken care of. This can include things like making sure that the right songs are played at the right time, making sure that there is enough music for the duration of the wedding, and making sure that all the necessary equipment is set up and ready to go. Having a DJ wedding checklist can help to avoid any last minute surprises or problems that could disrupt the flow of the wedding.