AOL Ad Net Hits 91% of U.S. Internet Audience in March

Each of the top 15 ad networks delivered ads to at least half of the total U.S. Internet audience in March, says ComScore. Platform-A, the AOL ad network that combines Advertising.com, Quigo and Tacoda, served ads to 170 million U.S. Internet users in March, representing 91 percent of the total U.S. online population, to rank as the top ad network.

That's not to say 91 percent saw or interacted with every ad, but that the network placed them. That's serious reach, on at least one dimension.

On a stand-alone basis, Advertising.com would rank as the top ad network with a reach of more than 167 million Internet users. Yahoo! Network ranked second with a reach of 160 million, followed by Google Ad Network (152 million) and Specific Media (140 million).

As ad networks have expanded their reach and influence online, a new crop of ad networks has surfaced to serve specific demographic and behavioral target segments, says comScore

Snap Shots Network delivers ads to users of Snap.com’s Snap Shots. The network reached more than 18 million U.S. Internet users in March. Widgetbucks Network delivers contextually relevant ads through a widget, and had reach of 9.5 million, while NeoEdge Game Network, which delivers ads through games, had a reach of nearly 1 million.

Other ad networks on this list target specific audience segments, such as HispanoClick by Batanga (Hispanics), Indieclick (young influencers or “tastemakers”) and The Heavy Men’s Network (men).