You will need to install MetaMask (or another Ethereum wallet) to connect to EW-DOS applications on the Volta test network or the main network, and to sign transactions on the blockchain.
Read more about using MetaMask here.
If you are using applications or smart contracts on the Volta Test Network (testnet), you will need Volta tokens.
Learn how to get Volta Tokens here.
Once you have Volta tokens, you will need to connect MetaMask to the Volta blockchain.
If you are using or developing applications or smart contracts deployed on the Energy Web Main Network (mainnet), you will need to have Energy Web Tokens.
Learn how to get EWT here.
Once you have EWT, you will need to connect MetaMask to the Energy Web Chain.