Hello,
There are two types of descriptions you can add to product category pages in WooCommerce with the WoodMart theme:
Navigate to Products > Categories in your WordPress dashboard > Edit the category where you’d like to add the description and add your content to the “Description” field or in the extra description field. https://ibb.co/DgZSj7d
You can change the position description of the category from Theme Settings > Product Archive > Category Description Position: https://ibb.co/p1cpLK2
Best Regards,