A parked domain points a new domain name to the same directory that your primary account points to.
How to setup a parked domain
If you registered your domain with someone besides 1uhost.com, make sure that the name servers are pointing to the nameservers that is sent on the welcome email of 1uhost.com, if you are unsure about the details please contact support@1uhost.com to get your nameservers details. In 1uhost.com cPanel, select 'Parked Domains' under the 'Domain' menu and enter the domain name you wish to park in the 'Create a New Parked Domain' form.