Facebook just topped 2 billion monthly users. 

It took the social network less than five years to go from 1 billion monthly users to 2 billion.
"As of this morning, the Facebook community is now officially 2 billion people! We're making progress connecting the world, and now let's bring the world closer together," Facebook CEO Mark Zuckerberg wrote in a Facebook post Tuesday.

But it hasn't been all smooth sailing for Facebook. The social media giant has recently faced criticism for its handling of fake news, disturbing live-streamed videos, and for creating partisan echo chambers.

Last week, Facebook changed its mission to focus on building communities (largely through Facebook groups) rather than only connecting individuals to each other.

More at CNN.