Know the differences between these types of domain before get a new one.
Subdomain:
A subdomain is a second website with its own unique content, but there is no new domain name. Instead, you use an existing domain name and add it before your domain name. The subdomain name looks like customer.mydomain.com, vendors.mydomain.com, help.mydomain.com (assuming you already host mydomain.com).
Addon Domain:
Addon domains are handled similarly to subdomains in terms of the file structure listed in your file directory; however, the addon domain URL appears like a primary domain. In general, nothing that happens in your addon domain's files or DNS should affect what goes on with the rest of your domains.
Although addon domains do not have their own cPanel, you may still create email accounts, redirects, QuickInstall installations, subdomains, etc. Web statistics for the addon domain can be found under the subdomain's URL in the statistics application in cPanel.
Parked Domain:
A parked domain is NOT a unique website. Instead, it is a masked forward to the primary domain name of your cPanel account, much like a website alias. Parked domains are commonly used when:
- You need a place to park a domain for which you do not have a website
- You have more than one domain that should lead to your primary domain
- You have common misspellings of your domain name that you have registered
