This ‘grab-and-go’ slide deck synthesizes key findings from the Zero-Dose Learning Hub (2022–2025), providing a concise, decision-oriented overview of what works, and what does not, in identifying and reaching zero-dose and under-immunized children. Designed for rapid use by policymakers, program managers, and partners, the deck distills cross-country insights across Bangladesh, Mali, Nigeria, and Uganda, alongside actionable recommendations grounded in implementation research. It highlights critical themes such as the need for granular subnational data, context-specific service delivery, stronger links between identification and vaccination, and the importance of embedding evidence use within routine systems. Users can quickly navigate an executive summary, cross-country insights, and detailed country-specific findings to inform strategy, planning, and adaptation.