One of the central concepts of marketing and sales is the funnel — through which companies are supposed to systematically move prospects from awareness through consideration to purchase. But consumers are now more informed, connected, and empowered than ever. Does the funnel still work in a digital, social, mobile age? HBR asked some of the leading marketers in the world - from companies like Google, Intuit, Sephora, SAP, Twitter, and Visa - to assess the relevance of the marketing funnel. What we found says as much about the future of business as it does about the future of marketing. Get the full story at HBR