This article explores how new data sources and technologies can strengthen Sustainable Development Goals (SDG) monitoring and evidence-based decisions. Delivered as a keynote address at the High Level Political Forum on Sustainable Development 2026, it examines the data challenges facing SDG monitoring and delivery, the opportunities presented by digitalisation, administrative data, big data and AI, as well as the importance of building strong national data ecosystems to transform diverse data sources into official statistics and policy insights for SDG monitoring and decision-making.