Which categories and items can be reached and shown on your website depends on the fact if it has a menubutton in the menu.

This means that which items are available between the frontend (website) and the administrator are completely separated.
Only items, categories etc. that have a menu-item can be shown on the website, the administrator can contain much more if needed.
These items are only available for the administrators of the website through the /administrator url.
The administrator can for example contain a list of contacts only for the administrators...

Here is a list of the most used sort of menu items you can make

• Default list of items of a single category
• Add a new item form
• Flatlist of items from one, all or multiple categories
• A reaction form for collecting reactions form published items.
• A review form where visitors can send you a review
• a single item
• Items in a Tree view with the start-category and it's subcategories on the left and item on the right
• Searchpage: Create a searchpage where visitors can search in one or more categories. Search results can be set to list or table view

The default List, Tree view and flatlist view can show items as a list, a table or a gallery
And these shown items can be filtered by one or more tags.

The default List view can also be shown as calendar. The calendar can show only items of one category..

What the items should let the visitor see can be set at every menu item extensively.

In the video below we show you some examples of what is possible.