The STAP information note on “strengthening source-to-sea approaches in the GEF” provides an overview of the S2S concept, highlighting the important role the GEF has played in advancing the approach, barriers to effective implementation, and presenting advice on how to enhance the adoption and scale up. The paper builds on STAP's 2017 publication, which provided a conceptual framework for implementing the S2S approach, emphasizing that the S2S approach could help facilitate policy coherence.