Polygon is a Layer 2 scaling solution for Ethereum. Originally known as Matic Network, Polygon offers various scaling solutions, including a proof-of-stake (PoS) sidechain, zkEVM Layer 2 chain, and a modular, open-source framework called the Chain Development Kit (CDK) that developers can leverage. Polygon’s native token, MATIC, is used to pay for network transaction fees and can be staked with validator nodes to earn rewards.