Polygon

A Polygon is a layer-2 scaling solution for Ethereum. Developers built it to address Ethereum's limitations, such as high transaction fees and slow speeds. Polygon operates as a Proof-of-Stake (PoS) sidechain. Users settle transactions quickly and cheaply on Polygon before linking them back to Ethereum. Its native token, MATIC, powers the network (also known as Polygon PoS).

Polygon works by running a parallel blockchain connected to Ethereum. Users send transactions to Polygon, where validators process them using PoS consensus. This requires staking MATIC. Every few blocks, Polygon creates a checkpoint of transaction data and submits it to Ethereum's mainnet. This setup ensures security from Ethereum while enabling high throughput—up to 65,000 transactions per second. For example, a DeFi user swaps tokens on Polygon for fractions of a cent, compared to dollars on Ethereum.

Polygon matters because it scales Ethereum without sacrificing decentralization. It reduces costs and speeds up dApps for gaming, NFTs, and DeFi. Over 7,000 projects use it, handling billions in volume. Security relies on Ethereum's finality; users can exit the sidechain via fraud proofs if validators act maliciously. This makes Polygon vital for mass adoption.

Key characteristics include the Polygon Bridge for asset transfers between chains, MATIC for gas fees and staking, and a vibrant ecosystem. Polygon also explores zero-knowledge rollups through Polygon zkEVM. Synonyms: MATIC, Polygon PoS.