Nameservers are very important because they help to determine where your files are hosted.
If you purchased your domain from TurnUpHosting together with a hosting plan, there is no action needed on your part as everything is set up automatically as seen in the screenshot below.

However, if you purchased only your hosting plan from TurnUpHosting, then you need to change your nameservers at your domain registrar to use our nameservers as listed below.
ns1.turnuphosting.com
ns2.turnuphosting.com
Please create a ticket with us if you encounter any issues.