The draft items are a solution for when it is needed to create data types quickly, since simply typing the title and pressing Enter you can create a new item.
The items that are created and do not have the mandatory fields complete, will have a label named "Draft". To unassign this label and for an item to stop being Draft, it is necessary for the user to complete the mandatory fields in the form.
In a draft item you can add more labels, manage members, add attachments and link it to other items.
It is also possible to filter by those items that have this label, so they are easily identified and can be completed so that they can continue their process.
Also consider that the Draft items updates will not be shown in the main feed