Polygon blockchain is a Layer 2 scaling solution for Ethereum, offering faster and more cost-effective blockchain transactions. It enhances Ethereum's capabilities by providing a modular framework for building interconnected blockchain networks. Developers use Polygon to create scalable decentralized applications (dApps) without sacrificing security or decentralization. With features like zk-rollups and sidechains, Polygon enables seamless interoperability and lower gas fees. It supports a wide range of use cases, including DeFi, NFTs, and gaming, making it a popular platform for blockchain projects seeking speed and scalability.