What Is The Advantage Of Blurtit Points? How We Can Achieve High Points?

There are no physical or financial advantages.  As Celticsgrl said, it's a matter of personal achievement, but it's can also be an indication of a member's credibility.  When you've been on the site answering questions and participating in debates, others get to know how reliable you are and may seek out your opinion and your advice.  Click on "Help" on the tool bar, and you can find an explanation of the scoring and the different levels you can achieve.

I think it's a personal indication of "achievement" for Blurters. The more you answer and participate in Blurtit the more valuable and "recognized" you become. It can also be a way of demonstrating to others your seniority and experience as a Blurter.