The Find and Replace Tags tool is useful for a number of reasons. For example, when a client uploads multiple files and tags them incorrectly. Also, if you want to get rid of a Tag that is currently in use, you must replace the Tag before you can delete it.
To use the Find & Replace Tags feature:
Select the Files page in the Left-Hand Menu.
Select all of the files whose Tags you would like to replace by selecting the checkbox next to the file name.
Scroll to the bottom and select the Tag icon.
Select Find & Replace Tags.
Select the Find dropdown and select the Tag you would like to get rid of.
Select the Replace dropdown and select the Tag you would like to add.
Select Replace Tag.
Note: Tag changes will also be reflected on the client side.