MetaMask is a popular cryptocurrency wallet extension for web browsers, primarily used for interacting with Ethereum-based decentralized applications (DApps) and managing Ethereum and Ethereum-compatible tokens. Here's a brief description of MetaMask. Browser Integration: MetaMask integrates seamlessly with popular web browsers such as Google Chrome, Firefox, and Brave. Once installed, it adds a small icon to your browser toolbar for easy access MetaMask Wallet Extension .