This document provides an overview of key concepts in public relations including: 1) Defining publics and prioritizing stakeholder groups. Internal and external publics should be identified for an online portfolio. 2) Comparing internal PR with external PR and the influence of primary publics on message delivery. 3) Discussing ethical guidelines around accuracy, honesty, and avoiding false or misleading information. Libel laws and issues of privacy and copyright are also pertinent. 4) Explaining the difference between persuasion and manipulation in opinion formation and the challenges of changing attitudes, beliefs, and opinions over time. Designs for effective persuasion must consider the audience.