The document provides an overview of key concepts related to defining and understanding gender-based violence (GBV) in humanitarian settings. It discusses GBV as violence perpetrated based on gender roles and power imbalances, often without consent, and in violation of human rights. Specific forms of GBV are outlined, as are root causes like gender inequalities and contributing factors like structural conditions. The document also addresses how GBV affects women, men, boys and girls differently due to socialization into gender norms and power dynamics.