That is the Call to Action widget position. There’s an html snippet in the theme download “extras” folder, but you can use this as a guide (from the demo site)
Use a text widget and title it: From Blogs to Business Websites
The content part is:
Created for your blog or business website, Celestial is a gorgeous theme that is fully responsive using Twitter's Bootstrap framework for your favourite mobile device like iPhone, Android, iPad, and more!
Then publish it to the Call to Action widget position.