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You can read detailed guide by Moz here
https://moz.com/community/q/topic/61742/how-to-reduce-the-spam-score-of-the-website

I was doing keyword research about glamour makeup and suddenly moz stopped updating KD. I tried many solutions but issue not fixed.

I did keyword research on Keyword explorer, its KD was very low but search volume was very high still my impression and clicks not getting.. what's the issue?