The is a test of how to get a URL link to open in a new window. Normally, when you add a link to your post and a reader clicks on it, they are taken to the new site...away from yours.
Here is a friend's website. Go ahead, click on it. See how it opens in a new window. Now I won't lose readers when I add a link to one of my posts. (When you only have 8 readers...you can't afford to lose a single one!)
I've been trying to do this for week's and finally figured it out. I'm so excited. Nerd joy!