The footer widgets are extra theme feature that you can use to display anything. Since it is widgetized, you can edit its contents by going to Appearance => Widgets.
The footer widgets are displayed at the bottom part your blog just above the footer bar.
Show or Hide
The footer widget area is enabled by default. You can hide it quickly by going to Appearance => Customize => Theme Settings => Footer Settings then from the dropdowm menu for "Footer Widgets Layout" select "No Widget".
Alternatively, you can reduce or add more widget. You can select up to four widgets only.
Edit Footer Widget Contents
If you want to change the content of each footer widget, navigate to Appearance => Customize => Widgets then start editing from Footer Widget 1, Footer Widget 2 and so on.