Facebook hit a major milestone with today’s Q4 2013 earnings as it crossed the halfway point and now earns 53% of ad revenue from mobile, or $1.37 billion of its $2.59 billion in revenue this quarter. The small-screen skrilla comes from 556 million daily mobile users up from 507 million in Q3, and 945 million monthly mobile users up from 874 million. Overall, Facebook hit 757 million total daily users and a cool 1.23 billion monthly users up from 1.19 billion in Q3.

Facebook reached 49% of ad revenue from mobile in Q3 2013 up from 41% in Q2 and 30% in Q1. But now 53% of its $2.59 billion in revenue came from mobile. [Update: On the earnings call, Facebook said Q4 was its first billion dollar mobile ad revenue quarter, and it made nearly as much on mobile in Q4 2013 as it did from mobile and desktop in Q4 2012.]

The boost has been driven by Facebook’s mobile app install ads that help developers get their apps discovered outside of the cluttered app stores. This quarter Facebook also introduced new mobile app re-engagement ads that can get users back into apps they downloaded and forgot about.

Read More:  http://techcrunch.com/2014/01/29/facebook-is-a-mobile-ad-company/?utm_campaign=fb&ncid=fb