Facebook is sharing some new stats and success stories from the Facebook Audience Network, which it says has grown into one of the largest ad networks in the world.

Facebook first unveiled Audience Network at f8 in April of last year. Mark Zuckerberg referred to it as the first time the company would help developers monetize in “a serious way” on mobile.

The network officially launched in October of last year, enabling the company’s then 1.5 million active advertisers to contribute to the monetization of mobile apps. As of September, that number had grown to 2.5 million, by the way.

According to the company, mobile apps on the network now represent 6% of all time spent in mobile apps. Facebook also says that on average, advertisers using the Audience Network scale their ad impressions by an additional 6-10% per campaign.

“Spotify has expanded their reach by 20% by using the Audience Network to connect to non-Facebook users,” the company says. “iProspect, a Dentsu network company, reported an 11% increase in average revenue per user since utilizing the platform.”

Facebook talks up the success stories more in a post on Facebook for Business.

Earlier this year, the company launched new ad formats for the Audience Network including native video and new formats for interstitials including Carousel Ads, Dynamic Product Ads, and Click-to-Play videos.

Last month, Facebook announced Advertiser Outcome Score (AOS) for Audience Network, which is described as a measurement system to evaluate publishers’ ad placements by their ability to drive outcomes for advertisers. Outcomes would be things like app installs, purchases, or registrations.

Images via Facebook