We started off as this platform inside Facebook; and we were pretty clear from the beginning that that wasn't where it was going to end up. A lot of people saw it and asked, 'Why is Facebook trying to get all these applications inside Facebook when the web is clearly the platform?' And we actually agreed with that.

The web is at a really important turning point right now. Up until recently, the default on the web has been that most things aren't social and most things don't use your real identity. We're building toward a web where the default is social.

Our strategy is very horizontal. We're trying to build a social layer for everything. Basically, we're trying to make it so that every app everywhere can be social, whether it's on the web or mobile or other devices. So inherently, our whole approach has to be a breadth-first approach rather than a depth-first one.

At Meta, we've been building social experiences for 20 years now. Originally, it took the form of a website, then mobile apps. But the thing is, I never thought about us as a social media company. We're not a social app company, we are a social connection company.

When I'm introspective about the last few years I think the biggest mistake that we made, as a company, is betting too much on HTML5 as opposed to native... because it just wasn't there. And it's not that HTML5 is bad. I'm actually, on long-term, really excited about it. One of the things that's interesting is we actually have more people on a daily basis using mobile Web Facebook than we have using our iOS or Android apps combined. So mobile Web is a big thing for us.

Back, you know, a few generations ago, people didn't have a way to share information and express their opinions efficiently to a lot of people. But now they do. Right now, with social networks and other tools on the Internet, all of these 500 million people have a way to say what they're thinking and have their voice be heard.