Facebook is finally rolling out its glamorously packaged version of journalism, Instant Articles, to a wide audience, meaning many readers that used to click on stories and go to media websites will instead consume stories within the social network.

After an initial run in May 2015 with just a few media outlets, Facebook now has more than a dozen publications on Instant Articles. The new feature only appears on Facebook's mobile apps.

That will mean a decline in traffic that used to flow steadily from Facebook, but also the chance at reaching even more people if the company's News Feed puts Instant Articles in front of an even larger audience. Facebook is also working with comScore to quantify the people that read Instant Articles and credit that traffic to the publisher.

Facebook announced the expansion of the program on Tuesday in a blog post.

TR Vishwanath, an engineer at Facebook, said the article will improve user experience by keeping users on its social network.

"Powered by the same technology that loads photos and videos quickly in our mobile apps, Instant Articles display as much as ten times faster than standard mobile web articles and feature tilt-to-pan photos, auto-play video, interactive maps, and embedded audio captions that let you explore stories in beautiful new ways," he wrote.

Instant Articles aren't necessarily going to start showing up in everyone's feed immediately. Facebook wasn't able to say exactly how many users will begin seeing the new feature, but noted that it will now be available to 12.5% of iOS users with the number set to rise. The feature will also soon be on Android.

Still, this represents the biggest step forward for what has become one of the most contentious media issues in recent memory. The idea of media organizations having to work with Facebook — and possibly giving up a chunk of their revenue — has caused no shortage of paranoia that the end result in the long run would be bad for media organizations and users.

But Facebook is now just one of many companies trying to entice media companies to share their content. Snapchat's Discover and Apple News are already open to the public and have many similar aspects to Facebook's Instant Articles. Twitter is also working on a new curation service with Project Lightning.

Facebook's partners include a mix of old and new media. The complete list: the Washington Post, the Huffington Post, MTV, Daily Mail, Elite Daily, Business Insider, Hearst, MLB, Complex, Slate, Bleacher Report, MoviePilot, Vox, Mic, Time Inc., Refinery 29, Bustle, The Dodo, CBS Interactive, IJ Review, the NBA, Gannett and the Blaze. Mashable is also part of the group.

Of all the publications, the Washington Post appears to be among the most committed. The paper said that it will be publishing every single one of its stories to Instant Articles.

That move comes less than a week after the paper struck a deal with Amazon — the Washington Post is owned by Amazon founder and CEO Jeff Bezos — to sell sharply discounted subscriptions to Amazon Prime customers.