Columns layout
The Columns layout web part provides a CSS-based column layout for content. Each column defines a separate web part zone, so any type of content may be added into it.
More information about layout web parts in Kentico CMS can be found in Kentico CMS Developer's Guide -> Development -> Web parts -> Layout web parts.
Left column
Left column are DIVs floated to the left.There can be more left columns.
Right column
Right columns are DIVs floated to the right. There can be more right columns.
Column layout
This column layout web part provides the DIV (CSS based) layout for your page. Each column contains web part zone.
Center column fills in the remaining space on the layout.
Even that this layout is DIV based, it supports equaling of the column heights to provide a table-like experience.