This document discusses organizational citizenship behavior (OCB), which refers to discretionary behaviors that exceed basic job requirements and promote organizational effectiveness. It summarizes key definitions and dimensions of OCB proposed by various researchers. Antecedents that influence OCB like job satisfaction, fairness perceptions, and leadership behaviors are outlined. Benefits of OCB for developing skills, making suggestions, and protecting the organization are highlighted. The document also notes potential pitfalls of OCB and areas for further research.