How important is it to be a PMP?

Same Importance as if you need to grow in your work and be the best in your Company.

PMP enhance the market value and distinguish among others in project management.
In some organization PMP is essential requirement for job of Project Manager.
Moreover, PMP is a kind of documentary proof of your skill/ ability of project management.

I never underestimate the value of a designation after my name.
I have a graduate certificate in Project Management.
My work experience in Project Management covers administrative and financial areas.
Teamwork has proven itself one of the most rewarding experiences of my life, and I look forward to more of its professional form: Project Management.
It is significant to note that the MMS, Masters of Management Science, after my name has little effect on those with whom I work.
Therefore, it is what I learned, not the status conferred, in acquiring the designation that serves me in my current employment.