Advanced Columns block acts as an outer wrapper and allows adding any Gutenberg block within it.
Columns - Decide the number of columns to display.
Column Gap option allows you to adjust the space between two columns.
Container Width controls allow you to choose a width for the columns. You can give a custom width of your choice to the columns from here.
You will get an option to select the background type as color, gradient, or an image.
Spacing tab offer options to customize the post slider. These options are separate for desktop, tablet, and mobile devices. The options are –
Name Bottom Margin
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 Radius - You can give border-radius to the columns 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.