Tags are different from product categories.
Product categories are usually used for a broad categorization of products like a T-shirt.
Product tags, on the other hand, describe specific aspects of the product like its color, intended customer, cost, etc.
Example : The tags for a T-shirt could be > casual, boy, blue, cotton, etc.
You can get access to Product Tags by navigating to Products > Tags from the WordPress Admin Navigation.
Adding Product Tags
Once you enter this section, you will find options to create new product tags.
Next fill out the fields for Name, Slug, and Description. Then click the Add New Product Tag button.
Product tags can also be added directly at the time of product creation via the Add product page. Beneath the section of product categories, you will normally find the meta box for Product Tags. Here you may enter the relevant tags, each separated with a comma, and then click the Add button.
To display product tags on the front-end, click the Save Draft or Update button. You will see a similar result to the one shown in the above figure.