Testnet Faucet, where you can receive some free TZERO tokens that are needed to interact with Aleph Zero Testnet and experiment with smart contracts development.
The required steps are simple:
Open the Accounts tab of the Testnet wallet and add an account following the on-screen instructions.
Use the Testnet Faucet to receive coins for your newly created account - just copy your account address and paste it into the Faucet. Your TZERO will be available almost instantly - certainly before you can switch back to the tab with the explorer to check it :)