Google has released a list of the top 1000 most visited sites on the web, as measured by unique visitors.
As Search Engine Land notes, Google is not only making this ranking available, it is also offering advertisers the option of purchasing ads exclusively on these top 1000 most visited sites.
Google AdPlanner compiled the data from "a variety of sources including anonymized, aggregated Google Toolbar data from users who have opted in to enhanced features, publisher opt-in anonymous Google Analytics data, opt-in external consumer panel data, and other third-party market research."
Interestingly, Google has excluded some sites from the list--notably, several Google properties as well as R-rated sites. The company provides this caveat: "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."
Check out the top 13 most visited sites below. A third of the top 21 sites are Chinese, including Baidu, QQ, 163.com, and more.
#13 - Bing.com - 110,000,000 Unique visitors (users) 7% Reach 2,700,000,000 Page views
#12 - Wordpress.com - 120,000,000 Unique visitors (users) 7.7% Reach 1,200,000,000 Page views
#11 - Sina.com - 130,000,000 Unique visitors (users) 8.4% Reach 3,600,000,000 Page views
#10 - Mozilla.com - 140,000,000 Unique visitors (users) 9.2% Reach 2,100,000,000 Page views
#9 - QQ.com - 170,000,000 Unique visitors (users) 11.1% Reach 25,000,000,000 Page views
#8 - Baidu.com - 230,000,000 Unique visitors (users) 15% Reach 27,000,000,000 Page views
#7 - Blogspot.com - 230,000,000 Unique visitors (users) 14.7% Reach 4,400,000,000 Page views
#6 - Microsoft.com - 230,000,000 Unique visitors (users) 14.8% Reach 3,300,000,000 Page views
#5 - MSN.com - 280,000,000 Unique visitors (users) 18.1% Reach 11,000,000,000 Page views
#4 - Wikipedia.com - 310,000,000 Unique visitors (users) 20% Reach 7,900,000,000 Page views (No Advertising)
#3 - Live.com - 370,000,000 Unique visitors (users) 24.1% Reach 39,000,000,000 Page views
#2 - Yahoo.com - 490,000,000 Unique visitors (users) 31.8% Reach 70,000,000,000 Page views
#1 - FaceBook.com 540,000,000 Unique visitors (users) 35.2% Reach 570,000,000,000 Page views