Page layout 'full-width'
The first of the three basic page layouts is particularly well suited for the homepage of your site and for category pages, but can also be used for normal content pages.
Page layout 'RFA'
This second of three basic page layouts is meant for content pages with a need for showing related information next to the main content area.
Page layout 'deeper level navigation'
The third of the three basic page layouts gets automatically activated when a deeper level (left-hand) navigation is used.