Barbed Wire is a type of fencing material that consists of a series of sharp, pointed metal spikes that are twisted together to form a wire. The spikes are designed to prevent animals or people from crossing the fence by causing injury or pain if they attempt to climb or pass through it. Barbed wire is commonly used to enclose agricultural land, military installations, and other areas where security is a concern. It was first invented in the late 19th century and quickly became a popular fencing material due to its effectiveness and low cost.