Domain aliases are domains that you own, but do not contain any content. Instead, they point to the contents of another domain or subdomain on your account. This is useful, for example, to hold a domain that you will later sell, or use to redirect traffic to another domain.
To create a new alias, go to the DOMAINS section of cPanel.
In the domain field: enter the new domain that you wish to have replicate the contents of the primary domain of your hosting account.
To delete or modify the redirection on your alias, go to the Remove Aliases section at the bottom of the page.