Please follow the following step below down
1. First login to your Domain Provider
2. Go to the Domain DNS Management
3. Scroll Down & Find the Nameservers
4. Select Custom Nameservers
5. Now go to your hosting Provider and Sign In to Your Account Copy the Nameservers Provide By Your Hosting Provider
6. Paste the Nameservers in Domain Provider Nameservers Option
7. Now Click Ok Update/Save Nameservers
8. Finish All Done