While sharing its financial results for its first quarter, Twitter today announced a number of new milestones that showed the service’s user growth has slowed while its mobile advertising share has grown. The social network has now passed 255 million monthly active users, 198 million of which were monthly active mobile users as well.

The company also revealed that it generated $250 million in revenues, $226 million of which came directly from advertising. Of the latter, a whopping four-fifths came from mobile.

Here are the numbers as they appeared in the release:

  • Average Monthly Active Users (MAUs) were 255 million as of March 31, 2014, an increase of 25% year-over-year.
  • Mobile MAUs reached 198 million in the first quarter of 2014, an increase of 31% year-over-year, representing 78% of total MAUs.
  • Timeline views reached 157 billion for the first quarter of 2014, an increase of 15% year-over-year.
  • Advertising revenue totaled $226 million, an increase of 125% year-over-year.
  • Mobile advertising revenue was approximately 80% of total advertising revenue.

Last quarter, Twitter passed 241 million active users and 184 million mobile active users. In other words, the company managed to pick up just 14 million users in both categories over the last three months. The social network is still having problems with attracting new members, something many believe the recent profile redesign is attempting to address.

In Q4 2013, Twitter also found that 76.3 percent of its users accessed the service from a mobile device (phone or tablet). That number is now up to 77.6 percent. User growth is slowing, as is the growth for the percentage of mobile users.

Twitter also said last quarter that 75 percent of the company’s advertising revenue was generated from mobile devices. That figure has grown once again: 80 percent is nothing to balk at.

As we have said before, Twitter has shown it can make money from mobile. The problems remain the same as last quarter though: its user growth has slowed, and what investors want to see is long-term potential.

Top Image Credit: Scott Beale/Laughing Squid