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:
Click the Files page on the left-hand navigation.
Select all of the files whose Tags you would like to replace by clicking the checkbox next to the file name.
Scroll to the bottom and click the Tag icon.
Click Find & Replace Tags.
Click the Find dropdown and select the Tag you would like to get rid of.
Click the Replace dropdown and select the Tag you would like to add.
Click Replace Tag.
Note: Tag changes will also be reflected on the client side.
Related article: Customize Your Tags