Augur is an open-source, decentralized, peer-to-peer oracle and prediction market platform built on the Ethereum blockchain. Users feed real world information into Augur's contracts. The outcomes of Augur’s prediction markets are chosen by users that hold Augur’s native Reputation token (REP), who stake their tokens on the actual observed outcome and, in return, receive settlement fees from the markets. Augur’s incentive structure is designed to ensure that honest, accurate reporting of outcomes is always the most profitable option for Reputation token holders. There are several ways users can participate in Augur: you can trade shares in markets, create prediction markets, or participate in the reporting system to keep the Augur oracle honest.