Facebook Inc said on Tuesday that 2 billion people are regularly using its flagship service, marching past another milestone in its growth from a college curiosity in the United States to the world’s largest social media network.

And

Facebook defines a monthly active user as a registered Facebook user who logged in and visited Facebook through its website or a mobile device, or used its Messenger app, in the past 30 days.

That is just an incredible amount of people using the service. Even though I haven’t posted on Facebook in a year or so, I still do login, so I guess I’m one of those active users.