WTF is MetaMask!?

Hmmm… At decentralized exchange sounds kind of cool, I mean.. Bitcoin is so popular because it’s decentralized.. Is it easy to sign up though.. ? *clicks* “Connect an Ethereum wallet to get started.” *clicks* “Download MetaMask” – idk what meta mask is.. that sounds complicated.. maybe some day WTF is MetaMask anyways? It’s usually the