You may attach as many domains as you wish to your Website.
If you have several domains registered with Cabanova, you may associate them all with one single Website if you wish to.
To do so, follow these instructions:
Log into your Cabanova account and go to 'My Domains' 
Then from each 'Attached to Website' dropdown list next to each domain, select the site name you wish to associate the domains with 
By doing so, all your domains' URLs (http://www.yourdomain.com/) will be displaying your Website online.
Associating several domains with one Website is generally recommended for SEO (Search Engine Optimization)
If you have just one single domain registered, no worry! You can still optimize your Website for Search Engines.