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

Below are the options available in footer spacing.

 

Footer Padding

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

 

Widgets Margin Bottom

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

 

Widget Title Margin Bottom

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

 

Widgets Padding

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