This document discusses ITIL (Information Technology Infrastructure Library). It begins by defining what a service is and what service management entails. It then introduces ITIL as a set of best practices for managing IT services, consisting of 5 core books in version 3. It discusses each of the 5 stages (Service Strategy, Service Design, Service Transition, Service Operations, Continual Service Improvement). The rest of the document addresses common myths about ITIL, clarifying that while it provides guidance, it does not guarantee success and full implementation is not required to see benefits. ITIL is presented as a framework to understand best practices for improving IT services, not an instruction manual. Training and consulting are recommended for organizations wanting to apply ITIL.