order products or categories

In the WP Catalogue plugin there is a tab called “Reorder”. If you go to this tab you will see a list of all your WP Catalogue products and categories… in this list you will find you can drag and drop using your mouse cursor, to set the custom order that those products and categories appear on the front end.

You wrote:

Can we ordre product through the plugin ? how does this work ?
i dontt want to sell but allow visitors to reserve a product

No, this word “Order” refers to the order that posts in the WP Catalogue post type appear on your website. It does not refer to “ordering” as in a customer to place an order / reserve an item from your store.