This theme comes with 33 module positions. The blue widget positions allow to choose a widget layout which defines the widget alignment and proportions:
equal, double or stack.
The two available sidebars, highlighted in red, can be switched to the left or right side and their widths can easily be set in the theme administration.
For widget in the blue and red positions you can choose different widget styles. Take a look at the widget variations page to get an overview.