Test Faucets are common tools in the web3/blockchain ecosystem. There are many different faucets for all of the different blockchains, and the many networks deployed on them. Faucets are a way to fund your wallet with fake/test cryptocurrency for you to play around in a low-risk environment.
Here, we'll find a Ropsten faucet and use it to add test ETH to our newly-created MetaMask wallet.
If developing with Anvil was your "dev" environment, you can think of "testnets" such as Ropsten as being a public, pseudo-staging environment.