Scenario
You are to ship the goods that are requested by a customer or a retail store. To start the shipping process you created the outbound delivery to inform the warehouse team what has to be picked, packed and send to the goods recipients.
Delivery in a Nutshell

Outbound delivery documents have a two level structure: header and delivery items.
Orders have three levels. In addition to header and items there are also schedule lines.
In deliveries an item is created for every relevant schedule line.
In SAP S/4HANA for Fashion and Vertical Business outbound deliveries are created with standard transactions for single document creation like VL01N or VL01NO or collectively using standard transactions like VL10A, VL10B, VL10G and so on.