Facebook is testing mobile ads that appear on apps other than its own, the company said.

Facebook says: "As mobile continues to move to more app-based experiences, advertisers want to reach people spending their time in apps and developers need new ways to make money. To improve the relevancy of the ads people see, provide even greater reach for Facebook advertisers and help mobile developers better monetize their apps, we’re running a small test to show Facebook ads in mobile apps. Our aim is to demonstrate even greater reach with the same power of Facebook targeting for advertisers both on and off Facebook. While we have run similar tests in the past, this current test is more like a mobile ad network in that we are working directly with a small number of advertisers and publishers rather than an outside ad-serving platform. The current test is limited to a few advertisers and partners, and we will share more details over the coming months."