Social media has become an important tool for advertising and marketing. Companies use social media to target large audiences, build relationships, and earn positive reviews that can be converted into sales. However, companies must communicate with audiences in a human voice and manage risks, content, and customer complaints professionally on social media. Measuring engagement, branding, and integrating marketing strategies across different social media platforms are important for achieving return on investment and cost avoidance through reputation management. Case studies show successes like Wendy's pretzel chicken campaign and failures like KFC's ill-advised hashtag challenge the importance of real-time response for social media strategies.