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 hammock-hosting.com, make sure that the name servers are pointing to the nameservers that is sent on the welcome email of hammock-hosting.com, if you are unsure about the details please contact support@hammock-hosting.com to get your nameservers details. In hammock-hosting.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.