Already, the companies employing these types of advanced analytics have seen significantly improved click-through rates and higher conversion rates (between three and ten times the average). Additionally, McKinsey analysis shows that using data to make better marketing decisions can increase marketing productivity by between 15 and 20 percent—that’s as much as $200 billion given the average annual global marketing spend of $1 trillion.5

http://www.mckinsey.com/insights/marketing_sales/digitizing_the_consumer_decision_journey