What is the difference between product activation and registration?

Product activation and registration serve different purposes in the Microsoft ecosystem. Product activation refers to the process of verifying the legitimacy of a software license and ensuring it is only used on the intended number of devices. This process typically requires entering a unique product key or digital license to unlock the full functionality of the product. On the other hand, registration involves voluntarily providing personal information, such as name and email address, to Microsoft for various purposes. Registration enables users to receive important product updates, access technical support, or receive special offers. It helps Microsoft maintain accurate customer records, enabling them to provide personalized services and better understand their user base. In summary, product activation ensures the license compliance, while registration enables enhanced customer experience and facilitates communication between Microsoft and its users.