Your domain name is what people type into their browser to find your website. Still, the website’s address is really a unique string of identifying numbers called an IP address that isn’t easy for most people to remember. Your domain name functions as a memorable link or shortcut to the IP address, making it easier to get to your website without needing to remember its numeric address.
A primary domain is the main domain your account is primarily associated with or is named after. Usually, this is the very first domain that you used in your account. It’s also the domain that you use to log into your hosting account.
An addon domain is a fully functional domain that can be created from within your control panel. This addon domain is a new, unique website hosted in a new folder on your account so that you can host several domains from one control panel. You can give an addon domain email addresses, forwarders, and more the same way as a primary (main) domain on the account.
A parked domain is an alias of your primary domain — it points to the same website as your primary domain. Multiple domains, same website.
For example, if cars.com is your main website, you can purchase cars.net and assign it as a parked domain. If a visitor were to go to cars.net, they would see the same website as if they had typed cars.com.
A subdomain is a prefix added to your original domain name, like a domain within a domain, usually following the form subdomain.example.com. They behave very similar to an addon domain and are often created to separate your website’s different sections, such as blog.example.com or store.example.com.