Facebook continues to add users across all regions of the world. The number of daily active users (DAUs) now exceeds 890 million, an increase of 18% year-over-year, while the number of monthly active users (MAUs) topped 1.39 billion as of December 31, 2014, an increase of 13% year-over-year.
Mobile DAUs were 745 million on average for December 2014, an increase of 34% year-over-year. Mobile MAUs were 1.19 billion as of December 31, 2014, an increase of 26% year-over-year.
Mobile advertising revenue represented approximately 69% of advertising revenue for the fourth quarter of 2014, up from approximately 53% of advertising revenue in the fourth quarter of 2013.
http://investor.fb.com/releasedetail.cfm?ReleaseID=893395