This evaluation will assess the impact of GEF/UNDP investments in terrestrial protected areas and protected area systems, especially seeking evidence from countries or landscapes where the supported areas can be compared with those lacking such support, or receiving other types of intervention. This evaluation will understand by impact as the positive and negative, primary and secondary long-term effects produced by a development intervention, directly or indirectly, intended or unintended. The evaluation will analyse how different management and governance approaches, in particular the extent of community engagement, impact on the achievement of GEF objectives in protected areas. The evaluation seeks to provide insights into how future interventions and support can best contribute to the sustainable management of protected areas as a contribution to the conservation and sustainable use of biodiversity. It will also assess the extent to which support has promoted human well-being as a necessary condition for the effective management of protected areas and immediately adjacent landscapes, and the factors and conditions affecting the interaction between human livelihood objectives and biodiversity objectives.