Google (NASDAQ:GOOG) revealed more than a year ago that it has more than 1 billion searches a day and averages 1 billion searchers a week.
Now it can add 1 billion unique visitors per month to that storied stat club. comScore revealed that Google's Websites, including its search engine, YouTube video-sharing site and Gmail, lured more than a billion unique visitors in May. That's up 8.4 percent from a year ago.
That would be nice if it weren't for the fact that Google's rivals are growing their online traffic, too. Microsoft, whose Bing search engine came on strong last year, followed with 905 million unique visitors in May, good for growth of 15 percent.
Facebook, meanwhile, saw its visitor count balloon to 714 million visitors, perhaps an accurate reflection of its current user base. Facebook's year-to-year growth was a remarkable 30 percent.
More impressive (and scary, for Google) is Facebook's user engagement stat: comScore said the social network's users logged 250 billion minutes worldwide in May, up 66 percent from May 2010.