Digital technologies designed for power systems are instrumental to unlock essential system services required to integrate high shares of variable renewable energy. They can also provide solutions to leverage data flows, connectivity, and management across the whole electricity system. To unlock these digital opportunities, adequate planning, investment, and policy action are needed. As part of the Digital Demand Driven Electricity Networks (3DEN) initiative, this report provides guidance for energy policy makers on possible ways to enable and drive investments in smart and resilient electricity grids. It also gives suggestions on how to start creating an environment that supports the effective use of innovative digital technologies within the electricity sector. It draws on examples and case studies to show the wide range of digital opportunities and solutions that can help governments implement efficient and smart power systems.