If you want the mobile version of your website to have a different background color then you can use this option by simply clicking on this icon and selecting the appropriate color or by entering the RGB, HEX or RGBA value of the color you want.
If you want the mobile website to have a different background image then use this option.
Change the text style for the mobile version of your whole website easily through this option.
If you want to change the spacing properties between the elements for the mobile version of your website, this is the option to use. All you need to do is to set the values for spacing.