For example, if you own osirion.co.za and it is the primary domain of your cPanel account, you can set up osirion.co.za as a parked domain and it will load the content of osirion.co.za. You will notice that although the content of osirion.co.za is loading in the browser, the address bar will display http://osirion.co.za/.
To add a parked domain, please do the following:
Domains must be registered with a valid registrar before they can be parked. In addition, they will not be functional unless they are configured to point to the same name servers as your primary domain.
What is the difference between parked, addon, and subdomains?
Do not confuse this with "Domain Parking" offered by domain registrars. When a domain registrar offers such a service, they mean to park your domain on their servers and direct traffic to a page of their choice. This is a good temporary solution if you don't have a webhosting account, but is very restricted.