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MetaMask is a cryptocurrency wallet and browser extension that allows users to interact with the Ethereum blockchain. It was created by ConsenSys, a blockchain technology company, in 2016. MetaMask has become increasingly popular as more people are turning to cryptocurrencies for transactions and investments.

One of the main features of MetaMask is its ability to act as a bridge between the Ethereum blockchain and regular web browsers. Users can install the MetaMask extension on their Chrome, Firefox, or Brave browsers and then use it to interact with decentralized applications (dApps) built on Ethereum. With MetaMask, users can securely store their Ether and other ERC-20 tokens and easily make transactions without having to switch between multiple wallets or platforms.

MetaMask also offers a range of security features to protect user assets. The wallet is non-custodial, which means that users have complete control over their private keys and funds. MetaMask uses advanced encryption methods to ensure that user data and transactions are kept secure. The wallet also supports hardware wallets, such as Trezor and Ledger, for additional security.

In addition to its basic wallet functionality, MetaMask also includes a range of advanced features for power users. The wallet supports custom network configurations, allowing users to connect to private or test networks as well as the main Ethereum network. Users can also interact with smart contracts and create their own custom transactions with the built-in transaction builder.

MetaMask has also become an important tool for participating in the rapidly growing world of decentralized finance (DeFi). With MetaMask, users can easily connect to popular DeFi protocols, such as Uniswap and Aave, and access a wide range of financial services, such as lending, borrowing, and trading.