Data has emerged as a powerful tool for driving social impact and fostering meaningful change in today's fast-paced world. Measuring outcomes, maximizing the impact of portfolios, and promoting financial inclusion relies on an effective data strategy. This article delves into the importance of data strategy in various domains, including outcome measurement, CDFI impact measurement, and social impact in sectors such as social enterprise and real estate. We will also explore the significance of measuring social impact, the role of IRIS impact measurement, lean data management, and the transformative potential of data-driven practices.