Facebook announced Q1 revenues of $1.46 billion and net income of $219 million. Most usage and engagement metrics were up: daily, monthly and mobile active users. On the latter point Facebook announced 751 million mobile active users, up from 680 million in Q4 2012.
Mobile only users were 189 million vs. 157 million in Q4 2012.
Total ad revenue in Q1 for Facebook was $1.245 billion, which was 85% of total revenue. Of that $1.245 billion ad revenue, 30% was mobile. That's up from 23% in Q4. What that means, as a practical matter, is that Facebook made $373.5 million in mobile ad revenue in Q1.
Facebook COO Sheryl Sandberg characterized Facebook is a “mobile-first” company and offered several examples of the company's mobile success during the earnings call. For example, she said that "3,800 mobile app developers used these ads to drive nearly 25 million downloads."
Facebook's FY 2013 global mobile ad revenues will probably land somewhere between $1.6 and $1.9 billion.