David Lewis, CEO of DemandGen International, discusses how the traditional demand funnel of moving leads from awareness to purchase is changing. He argues that companies now need to focus not just on acquiring new customers but also expanding existing customers. The demand funnel must be applied to both acquiring new customers in the upper funnel through content, data analytics, and programs, and expanding current customers in the lower funnel. Companies also need to track both prospect and customer behavior across the customer lifecycle to drive growth. Marketing automation and CRM technology will continue to evolve to help companies better manage leads, enable sales, and improve reporting on marketing and sales performance.