To delete a tag, navigate your Dashboard to Products > Tags.
In the Tags page, you will see all the created tags.
To delete a tag, you have two options:
Single Delete - Hover your mouse pointer on the tag that you would like to delete. You will see a Delete option pop-up. Click on Delete to delete.
Multiple Delete - To delete multiple tags, click on the box beside the tags you would want to delete. Then click on the drop-down box for Bulk Actions and choose the Delete option. Click on Apply button to delete.
Deleting a tag may affect the tags from other component of the site.