This key is used to install and activate the software. Depending on how you purchased Office 2013, the location of this key varies:
The "activation code" for Office 2013 is technically known as a . It typically follows the format XXXXX-XXXXX-XXXXX-XXXXX-XXXXX . office 2013 activation code
Click the File tab in the top-left corner and select Account . This key is used to install and activate the software