AOL announced today that it has entered into a definitive agreement to acquire Tacoda, an online behavioral targeting advertising network. Tacoda will operate as a wholly owned subsidiary of AOL. Founded in 2001, Tacoda employs advanced technology that enables advertisers to serve highly relevant ads based on the kinds of sites consumers have visited in the past. Using Tacoda’s technology, AOL will be able to extend its targeting capabilities to advertisers and publishers and extend the reach of its third-party display network, currently the largest in the U.S.