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 commuters to carry books, clothes, electronics, or daily essentials. Most backpacks have multiple compartments and pockets for organized storage, and some even come with padded sections for laptops or water-resistant materials for protection against weather. Lightweight yet durable, backpacks offer comfort and convenience, making them an essential item for people of all ages.