People are learning how to use the site and what's OK to share. As time goes on, people will learn what's appropriate, what's safe for them — and learn to share accordingly.

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

People have really gotten comfortable not only sharing more information and different kinds, but more openly and with more people - and that social norm is just something that has evolved over time.

About half my time is spent on business operation type stuff.

Really, who you are is defined by the people who you know - not even the people that you know, but the people you spend time with and the people that you love and the people that you work with. I guess we show your friends in your profile, but that's kind of different from the information you put in your profile.

In terms of doing work and in terms of learning and evolving as a person, you just grow more when you get more people's perspectives... I really try and live the mission of the company and... keep everything else in my life extremely simple.