Barbed wire is a type of fencing material made of strong wire with sharp edges or points. It is commonly used to secure areas, such as farms, military installations, and prisons. The design of barbed wire helps deter animals and intruders by making it difficult to climb or cross. Invented in the late 19th century, barbed wire revolutionized agriculture by allowing farmers to enclose their livestock and protect crops. Its use expanded during conflicts, including World War I, where it served as a barrier in trenches. Today, barbed wire remains a practical solution for security and boundary marking.