If you want to make your blog more unique with a .com web address that eliminates the wordpress.com, then you can register a domain name. Wordpress offers this option at a low cost of $18.00 per year along with 5 email free email addresses.

From the Dashboard, select My Domains under the Store options.

At the next screen, you will select Register a New Domain Name. If you already have a domain name from a previous site, you can select Map a Domain Name You Already Own.

Type in the domain name you wish to use. You can choose from several different options if you don't necessarily want a .com web address.

When you click Go, Wordpress will let you know if the domain name you typed is available or not.

If the domain you want is available and you are satisfied with your choice, then click on Register Now to complete the domain registration.