MetaMask is a private crypto wallet used for storing and swapping cryptocurrencies and NFTs. It comes in two versions which are browser extension and mobile application. Its fundamental purpose is to access Ethereum-enabled applications. It also helps the user in creating and managing identities of their own so that a secure interface is provided to the user to review the transaction whenever Dapp is performing a transaction and writing to the blockchain. It also helps you by warning you whenever you are about to access a site that is related to phishing.