A backpack is a versatile and convenient bag designed to be carried on the back using two shoulder straps. It typically features multiple compartments and pockets, making it ideal for organizing and transporting items such as books, clothes, gadgets, and personal belongings. Backpacks are commonly used by students, travelers, hikers, and commuters due to their comfort and practicality. Made from materials like nylon, canvas, or leather, they come in various sizes, colors, and designs to suit different purposes and personal styles. Whether for school, work, or outdoor adventures, a backpack provides hands-free carrying and balanced weight distribution, making it a popular choice for people of all ages.