Page Kind
Page Kind is really all about how weblobe organises your web pages.
nb; Page Kind options are not available on a seaction's home (index) page.
Normal
By default this set to a 'normal', as in a standard, self-contained kind of webpage, but there are other options.
Page Group
If you're publishing a lot of information you'll sometimes find that you need to divide big chunks of text into smaller, more digestible pages. See the page on Page Groups for details.
Page Group's Tab Navigation
Once you have made a page into a group the option to Use Tab Nav will appear under the Page Kind setting. Turning this on cause a linear row of tabs to appear at the top of the page, listing all the pages in the group.