This document discusses the growing field of marketing technology (martech) and provides recommendations for how marketers can manage the increasing complexity. It notes the rapid growth in the number of martech vendors from around 150 in 2011 to over 3,500 currently. It advocates that marketers adopt agile principles used in software, like experimenting, getting work into the market quickly, and adjusting based on feedback. The document also recommends a "bimodal" approach where the majority of investments focus on core systems while continuing wider exploration of new technologies and ideas on the "edge."