Ciaran O'Kane, ExchangeWire, global editor, muses over the potential impact of WPP's GroupM arm apparently halting the purchase of ad inventory from open

Ad servers enable advertisers and publishers to optimize, manage, and distribute ads across a multitude of paid channels within programmatic advertising.

AdQuick will source outdoor advertising options for your campaign from thousands of vendors. Then you can plan, buy, and measure your campaign all online.