This book proposes a model of internal communication based on empirical research to demonstrate how contemporary organizations strategize, organize, perform, and measure it. Internal communication is the management of communication between an organization and its members to inform, motivate, engage, and cocreate meanings to make organizations more effective. The book presents key concepts defining the successful implementation and execution of internal communication: internal communication satisfaction, employee engagement, employer branding, organizational support, and psychological contract fulfillment. Including an extensive literature review and informed by in-depth interviews conducted with corporate communication directors and human resource management directors in 25 Croatian organizations, the book uses original research to give practical guidance on internal communication best practices. The book is an ideal resource for researchers and advanced students of public relations and corporate communication broadly and internal and employee communication specifically.