Facebook CEO Mark Zuckerberg said today that more than 1 billion stories are being shared from Open Graph apps per day.

Open Graph apps are those that share users’ actions, such as reading, watching, listening and other custom activities to Timeline, Ticker and News Feed. These were first introduced in September 2011, but only began to be widely developed and used as of January 2012, when the social network began approving third-party integrations.

Open Graph is an important aspect of Facebook’s growing platform, which Zuckerberg repeatedly referred to as being core to the social network’s overall strategy. The CEO also said that Facebook’s vision for the platform is “bigger than most people perceive.” He urged investors not to think about the platform as being solely about games on Facebook.com, even though that is the vast majority of the company’s $192-million payments business. Zuckerberg believes his platform will actually extend beyond the web itself. He talked about the future possibility of buying a new car, logging in with Facebook, and having the car populate with your favorite music, your friends’ addresses, restaurants you like and places your friends have been to.

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