This document summarizes key aspects of public policy, including that it is a systematic response to issues, involves both advantages and disadvantages, and is a political process involving negotiation, power, and compromise. It discusses how policy can determine politics or vice versa, and how policymaking occurs through different governmental organizations. The document also introduces public policy processes and theories, including multiple streams theory which describes how problems, policies, and politics can align to create a "window of opportunity" for policy entrepreneurs to couple the streams and advance policies.