ITIL is a set of best practices and guidelines for IT service management (ITSM) that aligns IT services with the needs of the business. ITIL comprises a framework of processes and functions aimed at delivering high-quality IT services, improving efficiency, and minimizing disruptions. Key components include service design, transition, operation, and continual service improvement. ITIL promotes a service-oriented approach, emphasizing customer satisfaction, proactive problem management, and a lifecycle approach to IT service delivery. Organizations adopting ITIL benefit from standardized processes, improved service quality, and a structured framework for IT operations.