A frustration I have is that a lot of people increasingly seem to equate an advertising business model with somehow being out of alignment with your customers. I think it's the most ridiculous concept.

My goal was never to make Facebook cool. I am not a cool person.

There are definitely elements of experience and stuff that someone who's my age wouldn't have. But there are also things that I can do that other people wouldn't necessarily be able to.

The connectivity declaration is about uniting the whole industry - a lot of companies that typically compete very fiercely - to push in a coherent direction.

What really motivates people at Facebook is building something that's worthwhile, that they're going to be proud to show to friends and family.

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.

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.

This is our commitment to users and the people who use our service, is that Facebook's a free service. It's free now. It will always be free. We make money through having advertisements and things like that.

When I was in college I did a lot of stupid things and I don't want to make an excuse for that. Some of the things that people accuse me of are true, some of them aren't. There are pranks, IMs.

My friends are people who like building cool stuff. We always have this joke about people who want to just start companies without making something valuable. There's a lot of that in Silicon Valley.

Games is probably the biggest industry today that has gone really social, right. I mean, the incumbent game companies are really being disrupted and are quickly trying to become social. And you have companies like Zynga.

What really motivates people at Facebook is building stuff that they're proud of.

We just think that there are all these different ways that people want to share, and that compressing them all into a single blue app is not the right format of the future.

I just want to make sure when I have kids, I can spend time with them. That's the whole point.

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

I think we basically saw that the messaging space is bigger than we'd initially realized, and that the use cases that WhatsApp and Messenger have are more different than we had thought originally.

People love photos. Photos originally weren't that big a part of the idea for Facebook, but we just found that people really like them, so we built out this functionality.

It's against all of our policies for an application to ever share information with advertisers.

The majority of people who don't have Internet, don't have the Internet because they don't know why they want to use the Internet.

One of my big regrets is that Facebook hasn't had a major chance to shape the mobile operating system ecosystem.