Infura is a service that provides developers with easy access to the Ethereum blockchain and other decentralized networks. It allows users to connect their applications to the blockchain without needing to run their own nodes, simplifying the process of building and deploying decentralized applications (dApps). By using Infura, developers can focus on creating their applications instead of managing complex infrastructure. The platform offers reliable and scalable APIs, enabling seamless interaction with the blockchain for tasks like sending transactions, querying data, and accessing smart contracts. This makes it a popular choice in the Web3 ecosystem.