MetaMask is a digital wallet that provides users with a secure and easy-to-use gateway to decentralized applications. It comes equipped with a key vault, secure login, token wallet, and token exchange, all of which allow users to manage their digital assets in one place. In addition to supporting Ethereum and its ecosystem, MetaMask also supports a variety of Ethereum-compatible Layer 2 networks, including Polygon, Optimism, Arbitrum, zkSync, Celo, and Avalanche, which account for the majority of global smart contract network volume. MetaMask is available as a browser extension for Chrome, Firefox, Brave, and Edge, as well as a mobile app for both Android and iOS devices. By using MetaMask, users can connect to blockchain-based applications securely and easily.