A backpack is a versatile and convenient bag designed to be carried on the back using two shoulder straps. It is commonly used by students, travelers, hikers, and professionals to carry books, clothes, gadgets, or daily essentials. Made from durable materials like canvas, nylon, or leather, backpacks often feature multiple compartments, zippers, and padded sections to organize and protect items. Whether for school, work, or outdoor adventures, a backpack provides hands-free comfort and practical storage.