This plugin allow you to create other “posts types” than Posts. It can be usefull when you want to manage items in custom catégories.
For exemples a cooking recipe site or a real estate site.
If you have to new post type like “houses” and “flats” to manage in new types of categories named “for sale” and “for rent” ; Your products are not in a sub-category of “categories”. This is very usefull to sort and filter this without having normal posts mixed whit them.
Moreover, WordPress allow to make custom template file for custom post type easy by copy single.php in single-myposttype.php in order to get a layout different than normal posts. For exemple you can display post meta from metaboxes…
I will make a demo site later because i miss time, maybe next month.