What Is the Biggest Problem?

"The thing you really need to avoid is like, oh, there's that fancy model. I want to try," he says. "You can't be spending your time building things as though, like, this service is wildly popular." 'It means your focus on the wrong problem at this stage,' adds Mark Zuckerberg. "'I went from seing a unch of over engineer systems to vean lake' - Mr Zuckerberg.