Back to Glossary ITIL The globally recognized framework of best practices for IT service management, providing structured guidance on designing, delivering, managing, and improving IT services throughout their lifecycle. ITIL defines standardized processes for incident management, change enablement, service desk operations, and continual improvement, giving IT organizations a shared language and methodology for aligning technology services with business outcomes. The globally recognized framework of best practices for IT service management, providing structured guidance on designing, delivering, managing, and improving IT services throughout their lifecycle. ITIL defines standardized processes for incident management, change enablement, service desk operations, and continual improvement, giving IT organizations a shared language and methodology for aligning technology services with business outcomes.