Meta-mask is a cryptocurrency wallet and browser extension that allows users to interact with the Ethereum blockchain. It is a bridge that connects users to the decentralized web, giving them the ability to manage their digital assets, sign transactions, and interact with decentralized applications (dApps) that are built on the Ethereum blockchain.

Meta-mask acts as a digital wallet that securely stores and manages cryptocurrency assets such as Ether (ETH) and ERC-20 tokens. It also provides users with a unique wallet address, which they can use to receive and send cryptocurrency payments. Additionally, MetaMask enables users to connect to various dApps, which are decentralized applications that run on the Ethereum blockchain.

Meta-mask is available as a browser extension for Google Chrome, Firefox, Opera, and Brave. It can also be used on mobile devices through its mobile app. MetaMask is a popular tool among cryptocurrency enthusiasts, traders, and developers, as it simplifies the process of interacting with the Ethereum blockchain and its ecosystem of decentralized applications.