It's safe to say the Facebook co-founder and CEO knows a thing or two about building a company.
In a recent interview with Y Combinator, Zuckerberg offered advice for aspiring entrepreneurs.
Don't set out to build a company, he advised. Rather, "start with the problem that you're trying to solve in the world. … The best companies that get built are things that are trying to drive some kind of social change, even if it's just local in one place."