Aliases or Parked domain means that if you have multiple domains purchased for your company but only have one website, and the others you have reserved so that the competition would not buy them. For example, you have google.com, google.net, google.us, and only use google.com as your primary domain; the others are Parked or Aliases domains that only redirect to your main, i.e., .com.
In this option, we do just that. We enter the cPanel and then find the Domains option.
Now we add our parked domain as in the image below.
We simply enter our domain in the field and click on the Submit button.