What is difference between these 3?

[jamsen]

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 change the www to another name. The subdomain name looks like forums.domain.com, help.domain.com, help2.domain.com (assuming you already host domain.com).

An addon domain is a second website, with its own unique content. This type does require you to register the new domain name before you can host it.

A parked domain is NOT a unique website. Instead, it is a masked forward to the primary domain name of your account, much like a website alias. Parked domains are commonly used when you need a place to park a domain you do not have a website for, when you have more than one domain that should lead to your primary domain, or when you have common misspellings of your domain name that you have registered.

[terrenceperez56]

The difference between the three has been nicely explained by Moises Maionica. Truly, it is the ideal way through which it is possible to make use of the best financial services.

[anusha]

An add-on domain is just like having a separate web site. The add-on domain will be hosted or pointed to a folder in your public_html folder of your main-domain.
A subdomain is a second website, with its own unique content, but there is no new domain name.
A parked domain is NOT a unique website.You can park your domain name to indicate you are reserving it until you create your website, find a hosting provider, or sell the domain name to a third party.

[valeria]

1.Addon Domain :
An add-on domain having a separate web site or it is a new domain name that points to a subdirectory within your existing domain hosting account. The add-on domain will be hosted or pointed to a folder in your public_html folder of your main-domain. The Add-on domain should be already registered and the nameservers for the add-on domain should be pointing to the same nameservers as your main-domain.

2. Sub Domain :
A sub domain uses the existing main domain name. It does not have its own domain name. A sub domain points to a folder in your public_html directory of your main-domain. It is a way to create memorable web addresses for various sub-sites of your main site. Subdomain creates a separate URL and it is all within your same main hosting account.

3.Parked Domain :
A parked domain is simply points to an existing domain. It is an other domain which is parked on to the main domain. A parked domain is a domain that doesn't have a hosting account associated to it, and that is usually enabled with URL forwarding capabilities, so that it points to an existing website.

Now I understand the clear difference between these three.

[links123]

The difference was well explained by Maiosis Maionica. He is an expert banker and thus have good knowledge on financial services. I also comtact him for my financial services. I think you too should contact him.