TODAY | October 04, 2012
>>> we've got a major milestone to announce this morning. facebook has now reached 1 billion users. coming up, matt talks about that and more with mark zuckerberg . but first, natalie has more on the social network that has changed the world.
>> it has. from the wall street debut to the launch of the time line , it's been a big year for facebook . and with the unprecedented billion member benchmark, it's inching closer to having all the friends in the world.
>> reporter: it was 2004 when a 19-year-old named mark zuckerberg started a small website for college kids to share information.
>> did you ever dream 2004 in your dorm room in harvard when you started this thing you'd end up sitting here one day and say we're going to cross 200 million users?
>> no, i think that's a difficult thing to foresee.
>> reporter: but today a benchmark as facebook announces it has 1 billion users, 1/7 of the world's population.
>> facebook is an ecosystem. not only connects you to friends, not only connects yo uh to business opportunities , politicians are using it for their candidacy. it is huge.
>> reporter: who is facebook 's billionth friend? they joined on september 14th . that week the median age was about 22 years old. you might also guess they weren't american. facebook estimates 4 out of every 5 monthly active users live outside the u.s. and canada with many users logging on from brazil, india, indonesia and mexico.
>> clearly, the audience for facebook that continue to grow is going to be global.
>> reporter: today, facebook is posting its first ad ever online translated in 15 different languages.
>> these are things people use to get together so they can open up and connect.
>> reporter: to date, facebook users have liked something 1.18 trillion times. checked in somewhere 17 billion times, and shared an astonishing 219 billion photos. but they've also connected in ways few could have predicted.
>> a facebook page set up to support whitney has gotten thousands of likes with its stop bullying message.
>> i posted that photo on facebook , my kid looks really sick. within the first hour, three friends telling me to go to the hospital, it could be kawasaki disease .
>> countless other stories untold. 1 billion users and growing. what's not to like?
>> and with all those users logging on, facebook say people have friended each other 140 billion times and despite the strength in the mobile world they say they have 600 million mobile users, savannah.
>> that's amazing.
>> it is.
>> connected the world.