Facebook, aiming to boost revenue from marketing over wireless devices, is testing a service that places advertisements on mobile applications other than its own.

"Showing mobile ads outside of Facebook is another great way for people to see relevant ads and discover new apps," Facebook said in a statement.

By placing ads on third-party applications, Facebook follows competitors, including Google and Apple, in acting as a so-called ad network. The strategy would let it collect part of the revenue generated from mobile marketing and benefit from rising demand or ads that reach the growing number of people who socialize on mobile devices.