What is chainlink?

Chainlink is a decentralized blockchain oracle network built on Ethereum.The network is intended to be used to facilitate the transfer of tamper-proof data from off-chain sources to on-chain smart contracts. Its creators claim it can be used to verify whether the parameters of a smart contract are met in a manner independent from any of the contract's stakeholders by connecting the contract directly to real-world data, events, payments, and other inputs