Facebook hit 1 trillion pageviews in June, according to data from Google-owned ad network DoubleClick.
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.
The second most visited website was YouTube, which had 790 million unique visitors in June with 100 billion pageviews. Yahoo was in third place, with 590 million unique visitors and 78 billion pageviews.