A Barback is a support role in a bar or restaurant, responsible for keeping the bar area stocked, clean, and organized to assist bartenders and ensure smooth service. Key duties include replenishing alcohol, mixers, and garnishes; washing and returning clean glassware; maintaining cleanliness by cleaning spills and empty glasses; and changing out kegs. Barbacks often serve as a stepping stone into the hospitality industry, providing entry-level experience for those aspiring to become bartenders.