To create a tag navigate to the tag section and click on the button to create a new tag. Apply a tag type to categorize the tag.
To edit a tag click on existing tag in the list and click edit from the drop down menu. Changing the name of the tag will change it everywhere it is applied, e.g. Questions. You can also change the type of tag.
Click a tag from the existing list and click delete from the drop down menu as shown above.