What is the definition of service management?

Service management is the term used to describe how organizations manage their services to deliver value to their customers and other stakeholders. Service management requires a set of specialized organizational capabilities, such as processes, roles, tools, and competencies, that enable the effective and efficient delivery of services1. Service management is also a professional practice supported by an extensive body of knowledge, experience, and skills3. References: ITIL Foundation - ITIL 4 Edition, page 2; ITIL® 4 – A Pocket Guide, page 11.