A lot of people will say, "what's Facebook's business model?" I always find that a kind of funny question. Our business model is out there, which is: we monetize largely through advertising and a little bit through the gift revenue, the virtual gifts we have on our site. I think those continue to be the most promising avenues going forward.

In our performance reviews with women, we need to be saying, "Are you reaching enough? Are you applying for jobs when you meet some of the criteria like men, or are you waiting to meet all the criteria like women do?" There's so much we can do to encourage women to take on more and believe in themselves.

It turns out that a husband who does the laundry, it's very romantic when you're older. And it's hard to believe when you're younger. But it's absolutely true.

Women have made tons of progress. But we still have a small percentage of the top jobs in any industry, in any nation in the world. I think that's partly because from a very young age, we encourage our boys to lead and we call our girls bossy.

I would love to meet J.K. Rowling and tell her how much I admire her writing and am amazed by her imagination. I read every 'Harry Potter' book as it came out and looked forward to each new one. I am rereading them now with my kids and enjoying them every bit as much. She made me look at jelly beans in a whole new way.

I'm excited that more people, especially men, are understanding that equality is good for them. I don't want men to want equality for women because they're being nice to their colleagues and daughters. I want men to want it because it's better for their companies and their lives.

I hope you find true meaning, contentment, and passion in your life. I hope you navigate the difficult times and come out with greater strength and resolve. I hope you find whatever balance you seek with your eyes wide open. And I hope that you - yes, you - have the ambition to lean in to your career and run the world. Because the world needs you to change it.