MetaMask is a cryptocurrency wallet and browser extension that allows users to interact with decentralized applications (dApps) on the Ethereum blockchain. It is one of the most popular wallets for storing, sending and receiving Ethereum (ETH) cryptocurrency and ERC-20 tokens. 

MetaMask provides a user-friendly interface for managing your cryptocurrency assets and interacting with dApps. With it, you can create and import wallets, send and receive ethers and tokens, connect to various dApps and perform transactions on the Decimal blockchain. 

DecimalChain users can create accounts, manage their tokens, and perform transactions on DecimalChain using the MetaMask wallet. 

In addition, MetaMask also provides security and protection of users through encryption and storage of private keys directly on the user's device. The wallet is available as an extension for such popular browsers as Chrome, Firefox, Brave and Edge.