This book provides an understanding of the core pillars of trust and reputation systems in electronic business settings. It presents the main existing methods and evaluates them from a managerial point of view. The book outlines the necessary technological environment without entangling the reader in too much technical detail. An implementation roadmap on a strategic and tactical level is given as well as guidance on linking trust and reputation management to existing information systems. Existing standards and solutions like recommendation systems, web services, semantic and big data technologies are put into context to prevent subverting efforts using false ratings, faked identities and other security issues. An outlook into recent and future developments completes the book.