ITIL is a framework an organization conforms to NOT complies with. Explain?

ITIL is a framework as you mentioned ... hence the word conform to

It is NOT a standard that youorganizations comply with  ...  It is more of a reference or a guideline based on best practie in IT service management ,.. regardless of vendor, platform, system, industry sector, size of what so ever.    Hence it is good to benefit from this framework and adopt/embrace solutions that implement these recommedatons and guidelines 

ISO20000 , however is a different story as it is a standard that organizations can comply with if they wish ,, and get certified accordingly 

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ITIL is a framework which helps the organization to meet its SLA. ITIL uses the best practices. An organization needs a clear guideline to achieve its Mission and Vision. This framework most suitable for helpdesk management, support management. By implementing the ITIL the organization will get a better understanding about the areas to be improved. Will get clear understanding about the Roles and responsibilities of each person.

The top5 benefits are:

1. ITIL is proven and used worldwide

2. Improved customer satisfaction and relationships

3. Better reliability and quality of service

4. Optimisation of service delivery across the supply chain

5. Competitive advantage through value creation and agile change

 Ref Link:

http://www.connectsphere.com/resource/articles/top-5-benefits-of-using-itil