Does it feel like virtually everyone you know has a Gmail address? You're not alone. While discussing its latest fiscal results, Alphabet has confirmed that there are now over 1 billion active Gmail users per month, or 100 million more than there were last May. That's a big milestone, but it's almost surprising that Google's email service didn't hit the magic figure earlier. After all, Facebook reached the 1 billion mark last summer, and it's a non-essential social network -- you'd think a vital tool like email would get there first. Clearly, Facebook is a more common bond that transcends your choice of email providers.