ZRX is the native token of the 0x protocol that is primarily used to vote on governance proposals within the 0x protocol. 0x is an open-source protocol that facilitates peer-to-peer trade of Ethereum-based assets (ERC-20 tokens) on multiple blockchains through publicly auditable smart contracts without relying on centralized intermediaries. The 0x protocol is a product of ZeroEx Inc, founded in 2016 by Will Warren and Amir Bandeali. The protocol serves as an open standard and common building block intended to drive interoperability among decentralized applications (dApps) that incorporates exchange functionality using Ethereum smart contracts. Developers can integrate with 0x at the smart contract or application layer. The 0x protocol relies on decentralized governance in securely pushing protocol upgrades using the 0x Improvement Proposals (ZEIPs). ZRX is the native token of the 0x protocol and is primarily used to vote on governance proposals within the ecosystem. 0x supports the trading of both fungible (ERC20) and non-fungible (ERC-721) tokens. 0x also introduced a staking mechanism for market makers to participate in governance and earn ETH rewards for providing liquidity to the network. Holders of ZRX can also earn rewards by delegating their tokens to market-making pools as an incentive to market maker liquidity. Use cases of the 0x protocol includes exchange functionality for DeFi protocols and decentralized exchanges, OTC trading desks, and ecommerce marketplaces.