I think people tend to be worried about every new technology that comes along.

I mostly built stuff that I liked.

On engagement, we're already seeing that mobile users are more likely to be daily active users than desktop users. They're more likely to use Facebook six or seven days of the week.

We are working hard to build a service that everyone, everywhere can use, whether they are a person, a company, a president or an organisation working for change

I’m here to build something for the long-term. Anything else is a distraction.

Think about what people are doing on Facebook today. They're keeping up with their friends and family, but they're also building an image and identity for themselves, which in a sense is their brand. They're connecting with the audience that they want to connect to. It's almost a disadvantage if you're not on it now.

There are social restrictions where someone could be suppressing someone else's freedom to express themselves.