Hi @PRAVEEN RAJ S G Welcome to Q&A and thanks for looking into helping out around here.
An explanation of reputation points is here - https://learn.microsoft.com/en-us/answers/support/reputation-points
The quick answer though is that through providing great answers to questions here on Q&A, those answers get marked as accepted by the original poster or upvoted by others and add to your tally of reputation points. In turn, the higher your points - it shows others that your provided content is high quality.
Hope this helps...