There was a question posted to me yesterday on how to link a Website URL (e.g. domainname.com) to a Webhost (website hosting service like Hostgator or Siteground).  This video below will be a follow-up on an earlier tutorial I presented.  How this helps!

Step 1:  Login to your Webhost (mine is Siteground as seen in this example) and locate your cPanel
Step 2:  Copy the Nameservers (there should be two nameservers) as shown in the video
Step 3:  Login to your Domain Registrar (mine is Namcheap.com) and search for the domain URL you want to work on.
Step 4:  Locate the “Custom DNS” row and add the Nameservers into the respective fields
Step 5:  Save changes.

After the above is done, you may have to wait up to 48hrs for your Domain Registrar to effect the change.  If it still does not work, contact your Domain Registrar and have them help you rectify.

Cheers!