Asset Library is editor script, which helps you store and manage your assets and reuse them in different projects.
You can store your assets like scripts, materials, models, animations, etc. into one Asset Library folder and organize them into categories and subcategories.
Later you can reuse your exported assets in different projects, by importing them from the Import tab of the script.
You can submit a new updated version with version notes, and both old and new version will be available inside Asset Library folder.
Exporting/Importing assets from one centralized Asset Library folder
Sub-categories to easily group similar assets
Adding description and jpg image, so you can see a preview of your asset and what it is supposed to do.
Update your asset with version notes, so you can track your changes
Backup directory, so your assets will be automatically copied to both places.