The practice of policy advocacy by organizations has outpaced its theoretical development. Yet the importance of a theoretical grounding for advocacy campaigns has increased with the need for accountability and an understanding of advocates' contributions to policy development. This article synthesizes practitioner and academic literature on policy advocacy and proposes a conceptual framework of policy advocacy inputs, activities, and outcomes. Five distinct advocacy strategies are hypothesized: enhancing a democratic environment, applying public pressure, influencing decision makers, direct reform, and implementation change. This framework provides guidelines for organizations to strategically engage policy processes, while directing a research agenda on advocacy organizations.