People wait until late in their career to give back. But why wait when there is so much to be done?

The primary things that people do on the Facebook is they use it to share with their friends and the people around them and their community, and they use it to keep in touch with people.

Facebook is uniquely positioned to answer questions that people have, like, what sushi restaurants have my friends gone to in New York lately and liked? These are queries you could potentially do with Facebook that you couldn't do with anything else, we just have to do it.

I think that people just have this core desire to express who they are. And I think that's always existed.

I started the site when I was 19. I didn't know much about business back then.

In a world that's changing so quickly, you're guaranteed to fail if you don't take any risks.

Mobile is a lot closer to TV than it is to desktop.