A package draft is a version of your package before you submit it to the Asset StoreA growing library of free and commercial assets created by Unity and members of the community. Offers a wide variety of assets, from textures, models and animations to whole project examples, tutorials and Editor extensions. More info
See in Glossary. At a minimum, a draft represents the information on the Create new package page, but it can also include the Assets from your Project.
To create a new draft:
Open the Asset Store Publisher portal and navigate to the Packages tab.
Click Create New Package to create a package draft.
The Create new package page appears.
You can fill out the package details before or after you add your Assets to the package draft.
When you have a package draft, you can add and upload your Assets to it.