In the contemporary landscape of public administration, significant changes have taken place, driven by the need for efficiency, transparency and increased citizen involvement. Three key concepts encapsulate these changes: New Public Management, e-governance, and the ubiquitous role of social media. Each represents a transformative approach to governance, collectively shaping a more responsive and accountable public sector. This book explores the significant contributions of social media to democratic governance models, the realization of the principles of new public management and e-governance. It examines how social media facilitates transparency, improves accountability and citizen engagement, and encourages collaborative governance, thereby redefining traditional models of public administration. DOI: 10.58679/MM15993