External website name server question

I've created a website for my business using WIX.com and I'd like to connect my site to this domain using the "name server method". Not sure how to make that happen or what that means exactly. According to WIX.com the following should now become my updated name server settings:
- ns5.wixdns.net
- ns4.wixdns.net

Thanks for the help,
Aj