Category type controls how articles in this category are displayed in the public view.
There are four category types.
The Standard (default) type displays a list of articles, along with one or two lines of text.
If the category has sub-categories, these are displayed above the list.
The book type displays items as a table of contents.
The Quick FAQ type displays all articles in the category on the same page.
While the Quick FAQ (interactive) type displays all articles in the category on the same page as well, but with only the titles displayed initially. Click on the title to display the article, click on it again to hide it.