Metamask is a cryptomoeda wallet that can be used in the Chrome navigators, Firefox and Brave. It's also an extension of the navigator. That means it works like a bridge between normal navigators and a blockchain Ethereum. The MetaMask can be used to store keys only for Ethereum cryptomoes. Metamask wallet can be used to store keys for tokens Ether and ERC20 on three different web ships. It also allows users to sail on blockchain ethereum from a standard navigator. What other resources does he have? And they're good?