Facebook has company in the billionaires’ club, as Google-owned video site YouTube announced in a post on its blog that it has reached 1 billion unique monthly users. Of course, Facebook had 1.06 billion monthly active users as of Dec. 31, 2012, and MAUs are more specific than unique users. But 1 billion is still an impressive number.
We're kicking off our upcoming Social Media Marketing Boot Camp with a special keynote presentation by Ella Chick (left), the digital producer at Anderson Cooper 360°. She'll discuss how the network uses social media for breaking news and leverages social media to draw attention to organizations and causes. Learn more about our program and register here. 
Facebook was the No. 3 mobile website both in terms of market share of visits and average time spent during the week ending Feb. 23, in the debut of Hitwise Mobile from Experian Marketing Services.
