Social media has revolutionized PR, offering new ways to connect with audiences but also presenting ethical challenges. Transparency, authenticity, and respect for privacy are key principles in navigating this digital landscape. PR professionals must balance the power of viral content with responsible communication practices. Ethical challenges in social media include managing crises, combating misinformation, and respecting user data. Legal considerations like privacy laws and advertising guidelines are crucial. Best practices involve developing comprehensive policies, fostering transparency, and prioritizing authenticity in all digital interactions.