A backpack is a versatile and practical bag designed to be carried on the back, supported by two shoulder straps. It is commonly used by students, travelers, hikers, and professionals to carry books, laptops, clothing, and other essentials. Backpacks come in various sizes, colors, and designs, often featuring multiple compartments and zippers for better organization. Some models include padded straps and back panels for added comfort during long periods of use. Whether for school, work, or adventure, a backpack is a convenient companion for carrying daily necessities hands-free.