What is ITIL? IT Infrastructure Library definitions and solutions

What is ITIL?
The IT Infrastructure Library (ITIL) is a library of volumes describing a framework of best practices for delivering IT services. The ITIL has gone through several revisions in its history and currently comprises five books, each covering various processes and stages of the IT service lifecycle. The ITIL, currently ITIL v3, focuses on business and IT integration, and ITIL certifications can be earned at five levels. ITIL’s systematic approach to IT service management can help