You can now simply create, edit or delete a tag directly when you're publishing an episode.

To add a tag, enter the tag name in the "Add" box and then click the "Add" button. To edit or delete a tag, pause your cursor on the tag and you'll see the edit and delete icon to edit or delete the tag. if you delete a tag, you will receive a warning message that any posts under that tag will be sent to the default tag. 

Choose the tag for any post by simply clicking the box before the tag name (if nothing is chosen, the post will be filed under the default tag).

add or edit episode tags

Please note that the default tag can be edited but can not be deleted.
edit the default tag