ITIL® 4 (Information Technology Infrastructure Library) is a part of IT service management that allows the business scenario to adapt new skills by transforming IT services. The course was designed and developed by Central Computer and Telecommunications Agency. The course is a break up of five volumes each of which elaborates different stages of IT service management. This code of conduct allows an organization to develop high quality and cost effective IT services. It is the Office of Government Commerce that maintains now all the releases and updates of ITIL® 4.ITIL® 4 service strategy, ITIL® 4 service design, ITIL® 4 service transition, ITIL® 4 service operation, and ITIL® 4 continual service improvement are the five core publications. Service strategy tells us about the goals of the business and requirements of the business. Service design tells us how to implement those theoretically planned things that could be beneficial for the business. Service transition how to implement the situations in real time environment. Service operation helps us to understand how to manage the IT services. Minor errors can be resolved via continual service improvement.