Reinforcement for concrete involves adding materials, typically steel bars or mesh, to enhance the strength and durability of concrete structures. Concrete is strong in compression but weak in tension, so reinforcement helps it withstand various forces and prevents cracking. The most common type of reinforcement is rebar, which is placed within the concrete before it sets. Other methods include using fiber reinforcement or prestressing techniques. These reinforcements improve the overall performance of concrete in applications like buildings, bridges, and roads, ensuring they can support heavy loads and resist environmental factors.