This book constructively articulates the key issues and shifting nature of social media and technology. It also critically examines the impact of social media on foreign policy, economic security, national security, social behaviour, conflict prevention and global peace and security in the larger framework. Since 2004, the growth of social media has increased extensively and currently it has become more accessible to the public and has turned into a means by which people, non-state actors and also governments can share their foreign policy priorities to receive feedback, engage in diplomacy, educate the people and influence the foreign policy process. It has made an attempt to influence perceptions through digital diplomacy inevitable. Social media is both an asset and a threat to social and political well-being. There are various types of media used globally that provide platforms to debate as part of the freedom of expression which can also be misused for propaganda, spread hate speeches, rumours and fake news. They can also create instability in society and threaten national security. Apart from this, around 90 per cent of organised terrorism on the Internet takes place through social media. In this context, this book helps to identify the contemporary challenges and various issues emerging in the sphere of social media and advanced technology and suggests a mechanism to keep a check on activities that threaten national security. By considering the contemporary Global Security Environment and Emerging Threats from social media to Global Security Order, this book shares the ideas and diverse perspectives of various national and international strategic experts, policy makers and security experts on positive and negative impacts of social media. In addition, it helps to develop security measures, ethics, accountability and academic policy options for the new social media to receive positive outcomes. This book enhances the understanding of the inter-linkages of social media and national security. To establish peace and stability during crises and the demands of careful research, this book is based on primary and secondary sources of data collected through various institutions and universities. It fulfils this demand to a very large extent. It is a must-read book for defence and security professionals, strategic experts, industrial holders, scholars, researchers and security policy analysts.