More than four million businesses have Pages on Facebook that they use to have a dialogue with their customers.

We used to write this down by saying, 'move fast and break things.' And the idea was, unless you are breaking some stuff you are not moving fast enough. I think there's probably something in that for other entrepreneurs to learn which is that making mistakes is okay. At the end of the day, the goal of building something is to build something, not to not make mistakes.

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

There's a difference between being obsessed and being motivated.

I try to shrug it off as a minor annoyance that whenever I do something successful, every capitalist out there wants a piece of the action.

My number one piece of advice is: you should learn how to program.

There is something wrong with our system when I can leave here and make billions of dollars in 10 years while millions of students can't even afford to pay off their loans, let alone start a business. We all know you don't get successful just by having a good idea or working hard. You get successful by being lucky too. If I had to support my family growing up, instead of having the time to learn how to code. If I didn't know that I was gonna be fine if Facebook didn't work out, then I wouldn't be standing up here today. And if we're honest, we all know how much luck we've had.