Facebook really wants you to use its email function.
So much so, in fact, that the company switched the default email address that appears in every single user's profile to @facebook.com.
Most people don't even remember that Facebook created its own email program two years ago in a bid to keep users on the site for longer. But the company thinks its high time you check it out, apparently.
Why the sudden change? Two words: stock price. Erin Burnett breaks it down in tonight's Number.