What is the meaning and use of "I ANSWERED" tab in www.pidantuan.com

I am surprised to see the What is the meaning and use of "I ANSWERED" tab in www.pidantuan.com in every book/article request.
Is it necessary to press this tab when an answer is submitted to gain the points?

Please explain or answer about the use of this  

"

I ANSWERED"

I answered

Dr N B Shridhar

No matter how you submit the PDF, as long as it is accepted, you will earn points. That button is just to allow helpers to quickly locate the position where the PDF is uploaded.

Jinelle replied at 2025-3-19 15:22
No matter how you submit the PDF, as long as it is accepted, you will earn points. That button is ju ...

Thanks for the correct answer