For advance users, they also know there are settings to use your own domain other than the URL provided by blogspot. Example URL given by a blogspot is as http://blog.blogspot.com. But how about if we want to use the purchased domain name but still use blogspot hosting. Remember hosting providers are blogspot but domain are provided by domain registrar.
Ask your domain provider if they support custom domain for the blogspot. Some domain cannot be use with blogspot without hosting.
The example I show below is for the http://www.newsfornerd.com/