MetaMask is a plugin for Google Chrome browser. It can be downloaded from both Chrome Extension store or from their website metamask.io. Follow steps and you are ready to receive your Ethereum or ERC20 Tokens directly to your MetaMask wallet.
Fiat Money is the currency that is declared to be a legal tender by the government. The currency is neither backed by any physical material nor is its value based upon the value of material it is made of. FIAT full form doesn’t exist as it is the a single term.