The use of media to advance a policy objective is known as:

The use of media to advance a policy objective is accurately described as advocacy. Advocacy involves actively promoting a cause or policy in order to influence public opinion, policymakers, or other stakeholders. It often includes using various forms of communication, such as social media, press releases, and public presentations, to build support and raise awareness about the issue at hand.

Advocacy is essential in the context of prevention work, as it helps create a supportive environment for policy change and mobilizes community involvement. This process often seeks to inform and persuade others about the benefits of certain policies or practices, aiming to bring about social change.

In contrast, marketing is typically focused on promoting products or services rather than advocating for specific social or policy objectives. Public service announcements serve specific communication goals, often related to public awareness campaigns, but they do not encapsulate the broader and proactive nature of advocacy. Media literacy involves understanding and critically analyzing media messages but does not focus on the active promotion of policies or objectives. Thus, advocacy is the most fitting term for the use of media to drive policy change.