AdRoll Group is a nimble survivor in the shifting world of ad tech. Started in 2008 as a network that sold ads on specialized blogs, the firm morphed into a leader in retargeting, i.e. showing users ads for products they recently looked at but didn’t buy. By 2012, as AdRoll added more and more services, Inc. magazine ranked the company as America’s seventh-fastest-growing company. Then, last year, AdRoll Group surprised everyone by shedding businesses and restructuring itself into a pair of more focused units. We spoke to Scott Gifis, president of AdRoll, about the new business unit focused on marketing solutions for the Direct to Consumer economy.