To reduce need, risk and vulnerability, increasing numbers of countries are implementing the nexus approach. This has led to a growing and diverse experience in its operationalization, lessons learned and good practice. In response to demand by IASC members, Member States and donors for operational examples, good practice and lessons learned, Results Group 4 embarked on a mapping exercise in 2021. The aim was to provide a global overview of where and how HDP nexus approaches are implemented, and gather good practice and lessons learned.