Parked domains are used to direct the new domain to another or different domain in order to to display similar content. For example, if we have "first.com" and we want "second.de" to display the same website, we can set the "second.de" as a parked domain or "alias".
Step 1: Log into cPanel.
Step 2: Go to the Domains section and click on "Aliases" icon.
Step 3: Under Remove Parked Domains, find the domain you wish to remove.
Step 3: In the Actions column for that domain, click Remove.
Click here to learn how to add a Parked domain.