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Metamask is a popular web3 wallet and browser extension that allows users to interact with decentralized applications (dApps) and blockchain networks. It provides users with a convenient and secure way to store, send, and receive cryptocurrency and digital assets, as well as sign transactions and interact with smart contracts.

Metamask is available as a browser extension for popular web browsers such as Chrome, Firefox, and Brave. Once installed, users can create a new wallet or import an existing one, which is secured with a password and a seed phrase.