Explain the concept of unfreezing, moving and refreezing

What will be an ideal response?

To be effective, a change leader's initial task is to create what Lewin called
unfreezing—that is all forms for learning and change start with some form of
dissatisfaction or frustration. The second stage of Lewin's model involves
moving, whereby members of the group move from one set of behaviors to
another. Those new behaviors must become permanent, for at least a desired
period of time. That is the refreezing stage where a newly created equilibrium "is
made relatively secure against change. Refreezing is the stage, where social
system components become congruent with, and thus support, intended change
in one or more components."