Mobile accounts for more than half FB revenue

Mobile advertising accounted for more than half of Facebook’s total advertising revenue in the final quarter of 2013, a sign that the social network born a decade ago in the desktop computer era is succeeding in its goal of being “mobile first”.

Facebook’s earnings and revenue handily surpassed Wall Street’s expectations for the third quarter in a row as it further expands the number of users and the amount of money it makes on mobile ads.