This article provides an overview of the Understanding Settings component of the health promotion setting analysis framework for Algester Lodge Nursing Home. It covers the diversity of the setting, assumptions made about the setting, how it interacts with external environments and other settings, and the physical and psychosocial environmental determinants of health. It also discusses the primary and secondary stakeholders, their agendas, access to resources, and functions of the setting for different stakeholders. Finally, it explores power, influence, and social change, including who controls access, sets the agenda, and participates in decision making.