MetaMask is a popular cryptocurrency wallet that allows users to manage their digital assets and interact with decentralized applications (dApps) on the Ethereum blockchain. It is available as a browser extension and mobile app, making it easy for users to send, receive, and store various cryptocurrencies, including Ether and ERC-20 tokens. In addition to its wallet features, MetaMask provides a secure way to connect to dApps, enabling users to participate in activities like trading, gaming, and decentralized finance (DeFi). The wallet also includes built-in security features, such as password protection and seed phrase recovery, to help safeguard users' funds.