A backpack is a type of bag that you wear on your back, making it easy to carry your belongings. It usually has two straps that go over your shoulders and a main compartment for storing items like books, clothes, or snacks. Backpacks are popular among students, hikers, and travelers because they distribute weight evenly and keep your hands free. Many backpacks also come with extra pockets for organizing smaller items, such as a water bottle or a laptop. Some are designed for specific activities, like school or hiking, and may feature special compartments for items like a laptop or water bladder.