The success of Facebook is because we empowered people. We gave people a way to share their opinion online that a lot of people didn't have before, and to connect with people that they didn't have before and that is why we have been so successful.

Advertising works most effectively when it's in line with what people are already trying to do. And people are trying to communicate in a certain way on Facebook - they share information with their friends, they learn about what their friends are doing - so there's really a whole new opportunity for a new type of advertising model within that.

The main Facebook usage is so big. About 20 percent of the time people spend on their phone is on Facebook.

We're a community of a billion-plus people, and the best-selling phones - apart from the iPhone - can sell 10, 20 million. If we did build a phone, we'd only reach 1 or 2 percent of our users. That doesn't do anything awesome for us. We wanted to turn as many phones as possible into 'Facebook phones.' That's what Facebook Home is.

When we are thinking about stuff like embeds, we are not thinking about how we are competing with YouTube. We are thinking about how are we going to make it more useful for people to share stuff on Facebook.

We want Facebook to be one of the best places people can go to learn how to build stuff.