An elastic band is a loop made from rubber that can stretch and return to its original shape. It is commonly used to hold items together, such as papers or small objects, due to its flexibility and strength. Elastic bands come in various sizes and thicknesses, making them suitable for different tasks. These bands work on the principle of elasticity, which is the ability of a material to deform under stress and return to its original form when the stress is removed. They are often found in offices, homes, and schools, serving practical purposes in everyday life.