"we made changes to show fewer viral videos to make sure peoples time is well spent. In total, we made changes that reduced time spent on Facebook by roughly 50 million hours every day. By focusing on meaningful connections, our community and business will be stronger over the long term"
Daily active users (DAUs) – DAUs were 1.40 billion on average for December 2017, an increase of 14% year-over-year.
Monthly active users (MAUs) – MAUs were 2.13 billion as of December 31, 2017, an increase of 14% year-over-year.
Mobile advertising revenue – Mobile advertising revenue represented approximately 89% of advertising revenue for the fourth quarter of 2017, up from approximately 84% of advertising revenue in the fourth quarter of 2016.
Facebook - Facebook Reports Fourth Quarter and Full Year 2017 Results