For people using shared hosting you’ll receive a set of nameservers in your welcome email. They may not look much but they are essential in pointing your domain name to your website content. VPS users visit my Create Nameservers For VPS Servers article.
Nameservers always come in pairs.
Login to Domain Registrar
Locate the domain entry of the site you would like to edit.
Click the domain name and navigate to the Nameservers section. Once located click Manage.
Select Edit Nameservers and type in the host providers name servers as mentioned at the start of this guide. Finally click SAVE and wait until the changes propagate throughout the internet. This can take anywhere from a few hours to a day or two.
When the new Nameserver records have finished propagating throughout the web and working on the internet you’ll now be ready to publish your website.