Those windows opened on Thursday for Zuckerberg's first-ever public Q&A, and users responded in droves at the chance to have their questions answered.
Zuckerberg spent a little over an hour responding to submissions, touching on everything from his not-so-interesting wardrobe choices to his thoughts on 'The Social Network.'
Here are some of the most interesting highlights:
» Is Facebook becoming boring or losing its charm?
"My goal was never to make Facebook cool. I'm not a cool person, and I've never really tried to be cool," Zuckerberg said, laughing along with the audience. "Our goal isn't necessarily to make it particularly exciting to use; we want to make it useful."
He went on to compare the goal of the social network to electricity and even water, saying "the ability to communicate and connect with people should be [something] that people can rely on and have, but it doesn't need to be in your face."
» Why would you force us to install the messenger app?
The blunt question got Zuckerberg laughing, but he quickly got to it, admitting that requiring users to install another app is "a big ask."
"We really believe this is a better experience," he said, adding that more than 10 billion messages are sent everyday on Facebook. After the company did some research, they found that the messaging apps people used most were those that provided "dedicated, focused experiences."