What Is ITIL® v4

ITIL v1
The CCTA established the first iteration of ITIL in the late 1980s to address the low quality of IT services the British government had purchased at the time. The following were the four core concepts of ITIL v1: In compliance with business requirements, manages the availability of IT services (infrastructure, practises, tools, roles, etc.).
Managing on and takes care of any resource and service-related performance-related issues.

Management of contingencies: Aids in spotting weaknesses and aids in averting such situations.
Cost management: Assists in providing and managing IT resources and assets at a reasonable cost.

ITIL v2
With the 2001 release of ITIL v2, all ITIL-related publications were compiled into nine books. For this edition, the two novels with the most circulation were: As part of the service support, clear protocols are provided for handling service disruptions.
a group of rules, constraints, and regulations that are used in the design, creation, and delivery of services.
This version does not have a defined service lifecycle, in contrast to ITIL v3.

ITIL 2011 v3
A few significant updates to the concepts of ITIL v3 can be seen in this edition:
Service strategy: ITIL 2011 V3 recommended a new service called service strategy manager for individuals who create and implement an IT strategy that conforms with business needs.
integrates efforts across all designs and incorporates technical standards into the process of service design.
Implements effective change management to lower the likelihood that the service may fail during the transition.
Service operations: Upholds protocols for efficiently and effectively handling service requests.
The improvement process is introduced using a seven-step model that is easy to understand and follow:
Make a plan for improvement.
What do you plan to gauge?
collect the data
Process the data and analyze the information.
Present the information and use it.

Specialist in ITIL 4: Adding Value for Stakeholders
Expert in Directing, Planning, and Improving ITIL 4 Strategy at High Speed.

These lessons will be used by IT professionals who require the technical and practical know-how to oversee dependable IT-enabled teams, services, and workflows. If you want to become an ITIL 4 Strategic Leader or Managing Professional, you must complete all the modules. After doing so, you will have a much better understanding of ITIL and be able to use it successfully.