In addition to what's already been said, these keys can be used to change SKU on an existing install of Windows. For example, if you have Windows 11 Pro but you

In addition to what's already been said, these keys can be used to change SKU on an existing install of Windows. For example, if you have Windows 11 Pro but your volume licensing supports Enterprise, you can go into the activation settings and enter the generic key for Windows 11 Enterprise to upgrade to it on the fly.