The IT Infrastructure Library (ITIL) plays a crucial role in service management by providing a set of best practices for aligning IT services with business goals. ITIL guides organizations in managing services efficiently, ensuring quality throughout the service lifecycle, from design and transition to operation and continual improvement. By adhering to ITIL principles, companies can enhance service delivery, improve customer satisfaction, and reduce IT-related risks. ITIL fosters a culture of collaboration and communication among teams, ultimately leading to more reliable IT services that support business outcomes.