Section block acts as an outer wrapper and allows adding any Gutenberg block within it.
Content Width - Select width as Boxed or Full-width.
Width - Increase or decrease the width of the section.
Spacing tab offer options to customize the padding and margin separately for Top, Bottom, Left, and Margin.
You can select a background type for the block from here. The options available are:
Opacity: You can set opacity from here for the block.
Border Style - You can select the style of the border as solid, dotted, rigged, double, dashed, etc. You can also choose to hide it.
Border Width - Set a width for the border from here.
Border Color - You can give color to the border from here.
Border Radius - You can give border-radius to the box from here.
Box Shadow - You can give box-shadow to the block with a number of options available for customization such as color, blur, spread, position, etc.
Preset Size - Select the size of the text as small, default, large, or assign a custom value of your choice.
Under the Colors tab, color options are available for Text, Background.