They are fast on their feet, organized as f*ck, & understand all of the ways a project can go off the rails, so they keep that from happening by doing a lot of upfront planning and management on the day of the shoot. With photo and video shoots, everything is moving at such a fast pace and you need someone to keep everything running smoothly. That's your producer.
A great producer has a steady hand while navigating the unpredictable nature of video production and is skilled at guiding them in the right direction. The best producers have is omnipresent and know what all the players are doing at all times. They are incredible motivators, at times fabulous mediators and great at anticipating roadblocks in order to meet their deadlines on time and on budget.