How the section padding works?

Hi,

I am working on http://www.visualaddiction.at/ , before two days the theme was working fine.
In the home page below the banner, there was a gap between the banner and the three sections (Awesome Design, Awesome Price , Awesome Designers only!), but now the section showing 0 padding.

can you please help me what happened, and how the padding works?

Hello,

What exactly do you want to know and/or achieve?

Kind Regards, Roman.