The document discusses a social impact model for social enterprises. It explains that the model articulates how the enterprise achieves its social mission and measures its impact. The impact model describes the key activities of the enterprise and how they directly relate to and achieve the social mission. Each key activity results in its own impact, and together all the activities and impacts make up the full impact model. The document provides an example where selling clean cook stoves to rural families results in impacts like decreased cooking costs, reduced lung infection rates, and less deforestation. It recommends a 4-slide presentation format to concisely describe the mission, problem statement, solution, and impact metrics of the social enterprise's impact model.