Metamask is a browser extension that allows users to interact with decentralized applications on the Ethereum blockchain. It serves as a digital wallet, allowing users to store, manage, and send Ethereum and other ERC-20 tokens. Metamask can be added to the Google Chrome, Mozilla Firefox, Brave, and Microsoft Edge browsers as a browser extension. Once installed, it can be used to interact with various Ethereum-based applications, such as decentralized exchanges, games, and NFT marketplaces.

Metamask Extension