A handler assists the voice actor in their booth by greeting and welcoming fans as well as providing a price list for autographs, photos and merch. Experience in a wide range of customer service work (from retail and fast food to sales and call center) is helpful, but certainly not necessary (we train lots of first-timers who do a great job!).
In return for their talents, handler volunteers will receive 1 weekend pass to the convention, 1 free meal from a food truck on the day worked, and 1 invite to the celebrity party Saturday night (food provided, closed to the public). And you get to hangout with a voice actor all day!