In India, investment in digital public infrastructure (DPI) has transformed how the country does business and how its citizens interact with their government. DPI, or rails on which easy-to-use digital products and services can be built to benefit entire populations, has the potential to quietly remake entire economies through digital means in both the developing and developed world. However, to be successful, governments and businesses need to coordinate on how to invest in, build, and run this digital layer. The author lays out eight qualities of successful DPI projects, and how the public and private sectors can coordinate to build them.