Domain
A domain name is an address for the website you are having. This is used to access it via a browser over a mobile or a computer. The domain name can be a combination of letters and numbers.
Subdomain
A subdomain is like a subsidiary domain account for the main domain. Its contents are inside the home directory itself. The subdomain naming will be like 'something.example.com' when 'example.com' is your main domain.
Addon Domain
An addon domain is like an additional domain that can be used as a dedicated domain with the home directory inside the public_html folder itself. But it is like an independent domain account that can be used as a separate website.
Parked Domain
A parked domain acts as an alias to the main domain. It does not need any content for the website as it will be showing the contents of the main domain itself. You just need to add the parked domain from the cPanel and point the DNS.
