Goerli is a widely used Ethereum testnet that was designed to work with multiple Ethereum clients and uses a proof-of-authority or proof-of-stake-style consensus, depending on the era and configuration. It provides a shared testing environment where developers can deploy and interact with smart contracts using test ETH, without risking real funds on Mainnet.
Goerli became one of the primary testnets for Ethereum after legacy networks such as Ropsten, Kovan, and Rinkeby were deprecated. The specific set of active testnets can evolve over time, so developers should always check current ecosystem recommendations when choosing a test network.
