Difference between a sub-domain, parked domain and and add-on domain.

We get asked this question all the time. The answer is actually pretty straightforward:

Subdomain

• Let's say your domain is mysite.com.
• You install a Message Board and put in in a directory called mysite.com/board/.
• You can turn the directory board into a sub-domain by adding it as a sub-domain from your Control Panel.
• Now you can access your Message board as either  mysite.com/board OR board.mysite.com
• This costs you nothing and is free.

Parked Domain

• You have two domains mysite.com and my-other-site.com.
• mysite.com is the domain of your website and you want to add my-other-site.com.
• You want them both to go to the same place. In other words, when someone types either www.mysite.com or www.my-other-site.com they will go to the same page(s) on your website.
• In order to have additional parked domains, you need to purchase them from a registry.
• Register Parked domains 

Add-On Domains

• You have two domains mysite.com and my-other-site.com.
• You want the two domains to be totally separate/independent websites.
• In order to have additional add-on domains, you need to purchase them from a registry.
• Register Add-on domains here (open a new account if you don't have one registered)