An open protocol for decentralized transactions based on Ethereum blocks. Created by Ethereum's smart contract. 0x introduced the concept of Relayer. Relayer can be understood as any market maker, exchange, dApp, etc. that implements the 0x protocol and provides off-chain ledger services.

The advisory team includes the CEO of Coinbase, Olaf founder of Polychain, and Co-CIO Amir Bandeali of Pantera. They have  already  developed a community of tens of thousands of people. There are more than 20 decentralized trading platforms using the 0x protocol and applying it to 10+ DApps, including Marker DAI, Request, Augur, etc.

Ultimately, 0x wants to be an empowered driver so that ERC-20 tokens can complete transactions without going through any third parties.