News about Facebook
The country-wide tour is part of his New Year's resolution.
Chat apps get more popular as fonts of news.
It's called "favorites."
Videos about Facebook
He spoke with CNN’s Laurie Seagall.
No longer just a visual symbol, they’re now icons that people touch—and real estate is limited.
He gave the 2017 commencement speech at Harvard.
He urged them to take on “big, meaningful projects.”