- Facebook’s mobile ad sales jumped 41% Q/Q and roughly 4x Y/Y in seasonally strong Q4 to $1.24B. Mobile accounted for 53% of ad sales, up from 49% in Q3 and 23% a year ago.
- Total ad sales rose 76% Y/Y (an acceleration from Q3’s 66% clip) to $2.34B.
- 1.23B monthly active users (MAUs), +3% Q/Q and +16% Y/Y. Mobile MAUs grew 8% Q/Q and 39% Y/Y to 945M (77% of total MAUs). Mobile-only MAUs (a lot of them are in emerging markets) rose 17% Q/Q and 89% Y/Y to 296M (24% of total MAUs).