About URLs

A URL is the address of a file on the Web, such as www.example.com, or foo.example.com.
During the blog creation process, you'll have to select a URL for your blog. Visitors can access your blog by typing this URL into the address bar of their browsers.
Since there are already a large number of Blogspot blogs, you'll need to get creative and possibly try a few different URLs before you find one that's available. The format for your URL will be nameyouchoose.blogspot.com.
When selecting your blog's URL, remember that you can only use letters, numbers, and hyphens. Special characters such as $, #, &, etc. are not permitted.
You can find and edit your blog's URL by going to Settings | Basic.
Setting to change your blog address Remember that if you change your blog's URL, you release the old URL for other bloggers to use. You can also host your blog on a custom domain.