What is Chainlink(LINK) ?
Chainlink is a decentralized network that tries to bridge the gap between smart contracts on the blockchain and real-world applications that tend to exit blockchain most of the time.
Chainlink is a Blockchain Oracle platform that can connect to real-world applications, data, and an API. Oracles find and verifies real-world events and send this information to a blockchain to be used in smart contracts.
It does the job of filling the gap between off-chain businesses and data with on-chain smart contracts. It has two basic architectural components: on-chain infrastructure and off-chain infrastructure. Over-chain infrastructure consists of chain contracts applied to Ethereum's blockchain. These are Oracle contracts that process data requests from users who want to access off-chain data. Users requesting data from the blockchain send a request contract to ChainLink's network, making these requests the ones that match the existing contracts available for the user to apply to the contract.