This document discusses marketing trends in the 21st century. It notes that monthly web traffic and data usage have grown exponentially since 2005. The objective of marketing is to align brands with large market segments where advantages exist. While more customer data is available, analyzing it poses challenges. Product life cycles are shorter as differentiation becomes harder. The role of marketing has shifted from 30% to 70% of revenue generation as customers now require over 10 impressions before converting. Analytics are important to continuously refine marketing based on testing and key performance indicators. Both structured and unstructured data sources should be used to understand customer journeys.