Can you explain how the footer in Responsive Skin #6 works?

This is how the footer of responsive skin #6 works:

 

Column 1 (in this order)

Footer Content (Sites > [site name] > Settings > Content tab),
Share script area content (Sites > [site name] > Settings > SEO tab)
Logo (Sites > [site name] > Settings > General Info tab)
Contact Info (Sites > [site name] > Settings > Content tab)

 

Column 2 = Navigation Menu 2 (Sites > [site name] > Navigation)

 

Column 3 = Navigation Menu 3 (Sites > [site name] > Navigation)

 

 

Related article: How to customize the Responsive #6 skin