From this Widget section, you can customize a few of the widget elements. 

Footer Widget Padding: You can select whether you want to enable or disable Footer Widget Padding by toggling through the Yes/No option. 

Search Widget Style: Select from the available options of Search Widget Style. Pick the one you like and you can always change it whenever you want. 

Tag Widget Style: Similar to the previous option, from the Tag Widget Style you can select the style you want to use for the tag widgets to appear. 
Title Border Bottom: From here you can select whether you want the Title Border Bottom to be visible or not.