Metamask is a crypto wallet that provides users with a simple way of accessing blockchain applications and web3. It lets the users swap and store cryptocurrencies, associate with the Ethereum blockchain ecosystem, and host a growing array of decentralized applications. Metamask is one of the widely used crypto applications, where a user can gain access to their Ethereum wallet with the help of a browser extension or app. meta mask supports Ethereum and any Ethereum-related token like ERC-20, ERC-721 and many more. Metamask was founded by Aaron Davis and Daniel Finlay. Consensys a blockchain software development company owns Metamask.