Polygon blockchain (formerly Matic) is a Layer 2 scaling solution for Ethereum, designed to improve the network's scalability, speed, and transaction costs. By using technologies like Plasma and Optimistic Rollups, Polygon enhances Ethereum’s throughput, enabling faster and more affordable transactions. Polygon supports a wide range of decentralized applications (dApps), providing developers with tools for building scalable and user-friendly solutions. It enhances Ethereum's usability while maintaining a high level of security, making it one of the most popular Layer 2 platforms in the blockchain space.