Department stores(百货商店) in the United States are very large. They are called department stores because they have many different departments. For example, you can buy dresses, blouses and skirts in the Women's Clothing Department. You can buy suits, shirts and ties in the Men's Clothing Department. Parents can buy clothes for their children in the Children's Clothing Department. And shoes, boots and sneakers are in the Shoe Department.
There are a lot of reasons why people shop in department stores. You can buy things at a very low prices when department stores have sales. Sometimes stores even have half-price sales! In some stores, you can even eat lunch or dinner in a restaurant. Department stores are great places to shop because people can get almost everything they want in one place.