Facebook accounted for 17.5% of the $18 billion mobile ad market last year, up from 5.4% in 2012. This year, EMarketer expects the mobile ad market to soar to $31.45 billion with Facebook accounting for 21% of that total.
With a new mobile ad network on the way, Facebook is counting on mobile more than ever. 59% of Facebook's revenue came from mobile in the just reported first quarter. That is a leap of 29% from the 2013 first quarter. Overall, ad revenue soared 82% year-over-year. When you can report numbers like that, it makes Wall Street a lot less nervous about the company spending $19 billion on WhatsApp, as analysts come to the conclusion that "Zuckerberg's got a plan". And than plan is all about Facebook focusing on the mobile space, because that is where the people are going. The average American spent over 3 hours a day on a mobile device in Q1, up from two hours and twenty minutes a day in the first quarter of 2013.
source: USAToday, TechRadar