Picking is the process of

Picking is the process of moving the material from the subinventory (locator) to the staging area (gate area).

Shipping is the next process i.e. putting all the materials in staging in the transport vechile (like truck).

In between you might to packing and etc.

To add the above comment pick

To add the above comment

pick confirm  : Sub inventory transfer. Picking the items to be ship confirmed

and ship confirm : Shipping the items which are already pick confirmed.
This transaction depeltes your inventory.
Debits the COGS and credits the inventory