What is an Office product key?
Most of the Office applications and programs require a product key to run the installation and activation process. In order to access the authentic Office suite, you need to have a product activation code or key. Without an Office product key, you cannot log in to access the Office applications. Hence it is required to run the applications without interruptions. If you have purchased the Microsoft office suite online via office.com/setup then you will get the product key in the inbox. However, if you have purchased the Office suite from a retail shop then you have to ask for a retail card on which you get the Office product key.