Google's Doubleclick advertising unit this week updated its list of the 1000 most-visited sites on the Web (via labnol). The latest data Google has released, which is apparently from June 2011, shows Facebook sees 1 trillion page views monthly.
Facebook's website has 870 million unique visitors, and thus reaches 46.9 percent of all Internet users. Google's number of unique visitors to Facebook is much higher than the 750 million users Facebook says it has simply because certain sections of the site can be accessed even if you're not a Facebook member. Either way, this easily makes the world's largest social network also the single most visited website on the Internet, at least according to Google.
A little basic math (1 trillion divided by 870 million) shows us how many pages each user views on average (1149.43). It's quite clear that Facebook users do quite a bit of clicking on the social network; after all, the company says its users spend over 700 billion minutes per month on the site.
Facebook is not only first, but it is far ahead of any other online service. Second place (in terms of unique users, not page views) goes to YouTube, but it's only at 100 billion page views, or about 10 percent of what Facebook gets. Still, YouTube has 790 million unique visitors, which equates to a reach of 42.6 percent of all Internet users.
Rounding up the top five is Yahoo in third with 78 billion page views (590 million unique visitors), Live in fourth with 59 billion page views (540 million unique visitors), and Wikipedia in fifth with 6.4 billion page views (460 million unique visitors). Again, this is in terms of unique users; if we were going by page views, the top five would be: Facebook, Baidu, YouTube, Yahoo, and Live.
Google doesn't list itself (probably for competitive reasons), although it includes Yahoo, Baidu, and Bing. "Keep in mind that the list excludes adult sites, ad networks, domains that don't have publicly visible content or don't load properly, and certain Google sites," the search giant says.