ZRX, or 0x, is an open-source protocol designed to facilitate peer-to-peer trading of digital assets on the Ethereum blockchain. It enables developers to build decentralized exchanges (DEXs) that allow users to trade tokens directly from their wallets without needing a centralized intermediary.The key feature of 0x is its use of “relayers,” which are platforms that facilitate order matching. Users can create and sign orders off-chain, and relayers display these orders on their services. This process improves efficiency and reduces transaction costs.0x employs smart contracts to ensure that trades are executed securely and transparently. The protocol also includes its own token, ZRX, which is used for various purposes, including governance and incentivizing relayers.Overall, 0x aims to enhance liquidity in the decentralized finance (DeFi) space and support the growth of a more open financial ecosystem.