You can manage all your tags in one place. This includes deleting, merging, or renaming tags. Select the edit icon in the upper left corner of the tags page to bring up the Manage Your Tags tool.
Here you can filter by your own tags, or see your entire Organization’s if you’re a User Administrator. You have the ability to Delete, Merge, or Rename tags. The Merge tool can come in handy if you have, for example, a colleague who has trouble spelling… simply merge the misspelled tags into your brilliantly correctly spelled tag.