The Oracle market cap today is $4.48 Billion, a -0.3% change in the last 24 hours. Read More about Oracle
Oracles are used by protocols in their smart contracts in order to obtain external data. This allows the closed-off blockchain environment to communicate with data points on the outside world. For example, a protocol offering synthetic Nasdaq-listed stock on the blockchain will need to pull external data from the stock market. With an oracle, the protocol will be able to do so.