Reuters is reporting mobile users accounted for around 30% of the social media giant's first quarter ad revenue, a big win for a company that's vying for mobile screen real estate.
The move is part of what Facebook says is a deliberate strategy to encourage users to Facebook on their phones, rather than traditional desktop computers.
"We see this as a fantastic opportunity with empirical evidence of people staying engaged on mobile phones and using Facebook," Facebook's regional director for Britain and Southern Europe, James Quarles told the news wire.
"When people are that engaged, checking their Facebook 14 times a day, if advertisers can deliver the right message to the right audience you can really see some business impact," Quarles said.
The announcement follows a long period of controversy for the social networking giant, with reports it was stealing users' phone numbers and its Facebook Home Android app being largely deemed a failure.