Google reached 1 billion users in May

Google’s unique visitors in May exceeded one billion worldwide. This is the first time a website has reached that number in one month, according to comScore, Cnet reported.

The exact number of the monthly unique visitors to Google's sites was 1,009,699,000, up 8.4 percent from 931 million a year ago.

According to comScore, Google’s greatest numbers of visitors cam from India and South Africa, which contributed 14.3 percent and 13.5 percent, respectively. The lowest were from South Korea and China, which accounted for merely 0.7 percent and 0.8 percent, respectively.

Microsoft's sites were on the second place with 905 million unique visitors. Facebook came next with 714 million users, up 30 percent year-over-year. Yahoo! placed fourth with 689 million visitors, the Huffington Post reported.

According to the Wall Street Journal, comScore's numbers are based on its "global measurement panel" of two million online users, which the firm then refines with "page view" data from 90 of the 100 publishers of Web content, though not from Google.

Image: comScore