Chainlink (LINK) is a decentralized blockchain oracle network that provides real-world data to smart contracts on blockchains like Ethereum. Launched in 2017, Chainlink operates by connecting smart contracts to external data sources, allowing them to access and utilize information from the real world. Its significance lies in enabling smart contracts to make more informed decisions and perform complex tasks based on real-time data. Additionally, LINK, the native token of Chainlink, is highly liquid and easily convertible to other cryptocurrencies, making it a convenient option for investors and traders.