KEY POINTS
  • Facebook reported 184 million daily average users in Q4 2017, down from 185 million in Q3.
  • It is the first such drop since Facebook began reporting these numbers in its earnings report.
  • It suggests that Facebook's most lucrative market has become saturated in terms of usage, which means it will have to add more ads, or charge more for ads, to keep growing.

The number of people in the U.S. and Canada who check Facebook every day dropped between the third and fourth quarter of 2017, the first such quarterly drop in company history.

Facebook usage in North America has been largely flat for the last several years, leaving international growth to pick up the slack. But the drop suggests that Facebook usage has reached a saturation point in its first and most lucrative market, and could foretell similar usage drops around the world.