This document discusses assessing the impact of digital marketing channels. It notes the complexity of marketing and how an organization's greatest strengths can also be its biggest weaknesses. It provides a chart showing the breakdown of digital ad spending across different channels in the US. The document then discusses various techniques for assessing channel impact, including cookie splitting tests, geographic segmentation tests, and creative tests to evaluate return on ad spend and prospecting versus retargeting returns. It positions NMPi as a partner that can help with creative, technology, analytics, and media aspects of digital marketing tests.