To preview your content click on the computer icon on the top right corner of your screen.
When you publish your site for the first time, add a site name to complete the site URL. You can only use letters, numbers, and dashes in the site name. The beginning of the URL includes your organization’s domain and can’t be changed. You can continue to edit your site after you publish it. However, you need to republish the site to see any new changes.
Click Publish
Add a name at the end of your URL. You'll see a purple check box at the end of the URL if it is avaible.
Under Who can view my site select the permissions you would like to give and to who and click Publish.
To change your site's URL, un-publish your site or view your publish webpage click the down arrow next to the blue publish button.
Note: Each time you edit your site be sure to click publish so that your site includes the changes.