This is done by changing the domain name. You can use one you already own or register a new one.
so if i just used the free website builder my domain name is just Content-Crow.com but it i use the gocentral website builder it has the Content-Crow.godaddysites,com why is that?
It gives you a *.godaddysites.com address to use for testing while setting up the site. When it is ready to go live you would simply switch the domain following the article I posted above. The bare domain can only be associated with one hosting or hosted product at a time, if it is already set-up with a different site that would need to be removed before it can be added to this one.