MetaMask is a software cryptocurrency wallet that allows users to interact with the Ethereum blockchain. It can be accessed through a browser extension or mobile app, and it allows users to store and manage account keys, broadcast transactions, send and receive Ethereum-based cryptocurrencies and tokens, and securely connect to decentralized applications through a compatible web browser or the mobile apps built-in browser. MetaMask generates passwords and keys on the users device, so only the user has access to their accounts and data. It is a self-custodial wallet, meaning that users are always in control when interacting on the new decentralized web. MetaMask is developed by ConsenSys Software Inc., a blockchain software company focusing on Ethereum-based tools and infrastructure. It is an open-source application with an easy-to-navigate user interface and consistent customer support. MetaMask is free to use, and users can set up as many accounts as they want. It is a gateway into the world of dApps, and it connects to decentralized applications and smart contracts. MetaMask is powered by a strong community from across the globe.