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: Â Login to your Webhost (mine is Siteground as seen in this example) and locate your cPanel
Step 2: Â Copy the Nameservers (there should be two nameservers) as shown in the video
Step 3: Â Login to your Domain Registrar (mine is Namcheap.com) and search for the domain URL you want to work on.
Step 4: Â Locate the “Custom DNS” row and add the Nameservers into the respective fields
Step 5: Â Save changes.
After the above is done, you may have to wait up to 48hrs for your Domain Registrar to effect the change. Â If it still does not work, contact your Domain Registrar and have them help you rectify.
Cheers!