A Microsoft Word activation code (or product key) is a used to verify that your copy of Office is genuine. It typically looks like this: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX . The way you activate Word depends on your version:
Without a valid MS Word activation code, you won't be able to access all the features and functionalities of Microsoft Word. Here are some reasons why you need an activation code: ms word activation code