In footer bar spacing, you get an option to set spacing for footer layout. You can find the setting under Appearance Customize Spacing Footer Bar

Below are the options available in footer bar spacing.

 

Footer Bar Padding

Footer Bar Padding will add padding for footer bar from top and bottom sides.

 

Widgets Margin Bottom

It will add the bottom margin for individual widget inside the footer bar.

 

Widget Title Margin Bottom

It will add the bottom margin for title of widgets inside the footer bar.

 

Widgets Padding

It will add padding to the individual widget from all sides.