Facebook now has more than a billion mobile users every month

Facebook reported its first-quarter earnings, posting revenues of $2.5 billion and a profit of $1.07 billion in profit. That's a big improvement over the same quarter last year, when it reported $1.45 billion in revenues and $373 million in profit. That means in the last year revenue was up 72 percent and profit roughly tripled.

One of the numbers that really stood out was how much Facebook makes per user. In the US and Canada Facebook now makes $5.18 in annual advertising revenue per user. That's an increase of over 80 percent from one year ago. Facebook reported 1.28 billion monthly active users and over 1 billion monthly active mobile users. This time last year Facebook had 1.1 billion active monthly users and 751 million monthly mobile users, an increase of 34 percent. It was the first time it had over 1 billion mobile users in a single month.