The revision of the IASC Gender Marker was undertaken based on the feedback and requests received from humanitarian practitioners and stakeholders to enhance the quality and consistency of gender equality programming by deepening gender analysis with the inclusion of age; making the coding simpler and more reliable; and adding a monitoring phase so that measures could be assessed at both design and implementation. The revision has also supported closer alignment of the tool to commitments for protection mainstreaming and accountability to affected populations. The Gender and Age Marker (GAM) is a diagnostic tool for programming staff with relevance at the organisational, cluster and country levels. These alliances aim to strengthen its usefulness and reinforce the use and sustainability of the GAM.