NEW YORK -- Mark Zuckerberg is known for his long-term vision for Facebook -and for bringing the Internet to billons of people around the world who are unconnected.

The 29-year-old CEO of Facebook Inc. touched on both of those missions, in an on-stage interview at the Mobile World Congress in Barcelona, Spain on Monday.

Zuckerberg said his company's $19 billion acquisition of mobile messaging service WhatsApp will allow the startup to focus on growing its user base - and not on making money - over the next five years. With 465 million monthly members, Zuckerberg believes WhatsApp is on track to reach a billion users.

Zuckerberg spent most of his time discussing Internet.org, the ambitious project by Facebook and a slew of partners that aims to get everyone in the world online.