How to add short descriptions?
Go to Store Admin –> Settings –> Metafields –> Click Products
Now click on “Add definition” button and Select content type “Text”
Add data same as below
Name : Short Descriptions
Namespace and key : meta.short_des ( For Optimal theme must use “my_fields.short_des” )
Now go to your products and Scroll down to “Metafields” and Add text in short description and Click Save