Facebook said Thursday that its Facebook Exchange -- a technology that enables advertisers to track visitors on sites outside of Facebook back to the social network, and present advertising to them
there based on interests expressed online -- has moved out of preliminary testing. The exchange has been working with AdRoll, AppNexus, Brandscreen, Criteo, DataXu, MediaMath, Nanigans,
Kenshoo, Optimal, RocketFuel, Tellapart, TheTradeDesk, Triggit, Turn, Xaxis, and X+1 to test the platform.
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