If you purchased your domain name through a third party registrar (Enom, Network Solutions, GoDaddy etc.), you will need to change your DNS settings of your domain name in order for your web site to become "live" in your Trailhead Web Hosting Account.
Please contact your domain name registrar for step by step instructions on changing DNS.
Our DNS settings are as follows:
ns1.trailheadweb.net
ns2.trailheadweb.net
If you would like us to make these changes for you please submit a ticket with the domain name, the domain name registrar, the username and password.
If you purchased a domain name through Trailhead Web Hosting no action is required on your part.