Some WooCommerce shortcodes ask for the category ID to display a list of categories. More info at Shortcodes included with WooCommerce.
To find the product category ID:
- Go to: Products > Categories.
- Hover over a category name.
- Click it or click Edit when it appears.
- Find the page URL. For example: Section
tag_ID=1112where 1112 is the ID of the category.