What is the use of product key?

Related questions

1. How do I know if my Windows 10 is OEM or Retail?
2. How much is an MSDN subscription?
3. What is a MSDN license?
4. What happens after MSDN subscription expires?
5. How do I find my MSDN subscription ID?
6. Is MSDN license perpetual?
7. How do I activate my MSDN Azure subscription?
8. Can I buy a Windows 10 key online?
9. Can I use MSDN license in Azure?
10. Is Visual Studio 2017 community free?

Tags

1. #certifies
2. #product
3. #program
4. #software
5. #specific
6. #based
7. #known
8. #original
9. #computer