MetaMask is a software cryptocurrency wallet used for interacting with the Ethereum blockchain. It enables users to access their Ethereum wallet through a browser extension or mobile application, allowing them to interact with decentralized applications. Developed by ConsenSys, a blockchain software company focused on Ethereum-based tools and infrastructure.
MetaMask allows users to securely store and manage their account keys, broadcast transactions, and send/receive Ethereum-based cryptocurrencies and tokens. It provides a secure connection to decentralized applications through compatible web browsers or the built-in browser of its mobile application.
The application includes a comprehensive service called MetaMask Swaps, which aggregates multiple decentralized exchanges (DEXs) to find the best rates for exchanging Ethereum tokens. A service fee of 0.875% of the transaction amount is charged for this feature.
According to Bloomberg, as of November 2021, MetaMask's browser extension has over 21 million monthly active users.