Polygon blockchain is a Layer 2 scaling solution for Ethereum, designed to improve scalability and transaction speeds while reducing costs. It supports Ethereum-compatible blockchains and decentralized applications (DApps), offering a platform that connects multiple blockchains in a unified network. Polygon’s architecture allows for faster transaction finality and lower gas fees compared to Ethereum's mainnet. By providing scalability solutions like sidechains and rollups, Polygon enables developers to build decentralized applications efficiently while maintaining the security and decentralized nature of Ethereum’s blockchain.