• by Mark Walsh  @markfwal, April 24, 2012

Google was again the top Web property in March, with nearly 190 million unique visitors in March, up slightly from about 187 million in February. The latest data from comScore showed a familiar lineup trailing the search giant, with Microsoft second, with almost 179 million visitors, Yahoo (175 million), Facebook (159 million) and AOL (110 million).

The only significant change among the top 10 was Glam Media, which fell from No. 8 to No. 12 on the list after seeing its audience contract from 86.7 million to 78.3 million last month. That total is also down from 90 million in January, suggesting the media network geared to women is seeing some slippage so far in 2012.

Apple moved up a notch into the No. 10 spot, with a monthly audience of 81 million. Among the top-gaining sites overall was Instagram, which saw a roughly 20% increase in its audience to 8 million in March, even before the publicity surrounding its $1 billion acquisition by Facebook in April. March Madness and the start of the baseball season also helped put sports sites like ESPN, SB Nation and MLB.com among the fastest growing properties last month.