The proposed chapter examines how corporate social advocacy as a form of public interest communication can encourage public discourses/activism surrounding contentious societal, political, or environmental issues and drive societal changes through public activism. First, the chapter includes an overview of the field of public interest communication and discusses how public interest is defined in potentially divisive and contentious societal, political, or environmental issues. Secondly, the chapter expands upon the role of organizations in public interest communication and their potential to drive societal change through CSA. Third, this chapter discusses best practices for CSA in this context, including communicating values, aligning expectations and fit, engagement, listening, authenticity, and accountability, followed by a discussion of future trends with new technology and AI. Lastly, this chapter ends with a case example of CSA as public interest communication, highlighting salient theoretical linkages, best practices, and challenges.