A cashier's job description involves accurately processing customer transactions, handling various payment methods, bagging purchases, and providing excellent customer service at a retail counter. Key duties include operating cash registers and point-of-sale systems, balancing cash drawers, managing returns and exchanges, assisting customers with inquiries, and maintaining a clean checkout area. Strong customer service, attention to detail, basic math skills, and the ability to work in a fast-paced environment are essential for a successful cashier.