I’m going to venture a guess and say you have a Gmail account. Chances are, you have more than one. I say this with confidence knowing Gmail currently sports more than 1 billion monthly active users, up from a relatively paltry 425 million back in 2012. It’s free, it’s fast, it’s reliable, it offers ample storage for most users, and it’s relatively easy to organize, so it’s a prime choice for both business and individual users.