Public relations helps organizations adapt to each other through communication and relationship building. It involves anticipating and interpreting public opinion, counseling management, and conducting research to influence policy and ensure plans achieve public understanding. PR faces challenges of determining news from advertising and preventing "churnalism," where journalists publish press releases without original reporting. The BP oil spill showed lessons for crisis communication, including allowing discussion on social media, using multiple spokespeople, engaging in conversation not just broadcasting, and recognizing some crises prevent winning public opinion.