Using the Faucet
The faucet allows you to get some "test ada", so that you can try out features that require funds.
In order to use the faucet, you first need a payment address, which can optionally be associated with a stake address. You can get it with Daedalus STN or with the CLI (See Generating payment/staking keys and address)
Access the faucet here and follow on-screen instructions
https://testnets.cardano.org/en/shelley/tools/faucet/
Each time you use the faucet (which you can do once a day), you will get 1000 testnet-ada.