This document discusses optimizing the online marketing value chain from pre-click to post-conversion by analyzing data across the full funnel. It recommends taking a holistic view of the interrelations between media, creatives, landing pages and conversion paths, and testing combinations to find the best performing options for different target audiences and media sources. The author advocates using technology to integrate this value chain optimization and handle large datasets, in order to optimize landing pages and conversion funnels as part of the full marketing process and maximize ROI.