Your footer has up to 3 section options.  These sections are already set up (Content > Sections ) - "Footer Col 1", "Footer Col 2" and "Footer Col 3".  

Each section comes pre-set with Footer Monklets (more HERE), but you can add custom text and/or move around the monklets if you'd prefer a different order.

*NOTE - Leaving one of the Footer sections empty will increase the size of the remaining columns, but these sections should not be deleted and the section names should not be changed.