If you are activating Windows for a business or educational institution, you should use the official Volume Licensing Service Center (VLSC). Organizations use KMS (Key Management Service) keys, but these require a legitimate internal server to validate the activation, not a script from the internet.
The phrase refers to a public text file hosted on GitHub repositories. This file typically contains a basic script, often written in Batch ( .bat ) or PowerShell ( .ps1 ). windowsactivator windows activationtxt at master github hot