Metamask is a cryptocurrency wallet that can be used in Chrome, Firefox and Brave browsers. It looks like a browser extension. It facilitates communication between regular browsers and the Ethereum blockchain. The Ethereum blockchain is a network where users can create their own applications (called dApps) and cryptocurrencies. Blockchain wallet is known as a popular type of cryptocurrency wallet that supports mobile and website transactions. The positive sides of the wallet are: Open source code; Private keys are stored in the browser; Easy to use; Used to access the Ethereum blockchain.