This report examines the use of social media platforms such as LinkedIn, Facebook, and Twitter to enhance knowledge sharing, build social capital, support innovation, and aid problem-solving within multinational corporations (MNCs). It defines knowledge management and its importance, highlighting how social media facilitates knowledge sharing and supports various knowledge management practices. The report discusses the benefits of social media, including marketing opportunities, increased brand awareness, and competitor research, while also addressing the risks such as phishing scams, data security concerns, and reputation management challenges. It concludes by emphasizing the strategic role of social media in fostering innovation, improving communication, and enabling efficient problem-solving in MNCs, supported by academic references and real-world examples.