Data are the information we use as the basis for reasoning, analysis, and debate. They are the factual currency for evidence-based policy making. In a data-driven utopia, data would be highly valued and demanded and used ethically and effectively. But data travel a long journey, gaining value as they go, before they achieve their highest purpose. The data value chain provides a framework through which to visualize the life cycle of data, from defining a need to using them for impact.