To survive and thrive in the age of the customer, businesses must become digital. While many firms believe they have a digital strategy, few are thinking about truly digitizing their business strategy. Yet the pioneers of the digital revolution, be they B2B or B2C firms, are driving increased revenues through a superior digital customer experience and are increasing efficiency and agility through digital operational excellence. This report outlines the driving forces behind digital business. This is an update of a previously published report; Forrester reviews and updates it periodically for continued relevance and accuracy. We revised this edition to factor in new ideas and data.