1. Theory of Change provides a common framework for planning, evaluation, and strategic thinking by making explicit the assumptions about how and why a group's actions will lead to desired changes. 2. It involves stating a clear aim, mapping activities and outcomes using "so that" chains, and understanding how social change happens to achieve the campaign aim. 3. Using a Theory of Change allows setting a testable hypothesis for how change will occur, defining measurable benchmarks for assessing progress, and having agreement on what defines success.