Google Sites was the top-ranked Web property in August 2012, attracting some 187 million unique visitors, followed by Microsoft Sites with 170 million and Yahoo Sites with 164 million, according to data from the comScore Media Metrix service.
Making its debut among the Top 50 was Instagram, at No. 48, with 26.0 million unique visitors.
Facebook was No. 4, attracting 152.4 million unique visitors in August. Other social sites ranked among the Top 50 were LinkedIn (No. 26) with 40.9 million visitors, Twitter (No. 38) with 38.2 million, Tumblr (No. 39) with 29.8 million, and MySpace (No. 43) with 28.0 million.
Display Ad Ecosystem Rankings
For the August 2012 report, comScore expanded its display ad ecosystem reporting to provide additional granularity in the classification of ad publishers, networks, and other platforms that comprise the ecosystem.
Among syndicated Ad Focus entities, ShareThis ranked first, reaching 87% of the 220 million Americans online in August. Google was second with 81.6% reach, followed by Yahoo Sites (74.3%), Outbrain (72%) and Facebook.com (69.2%).