Think of it as a third-party user interface for an official Microsoft service.
You will need to choose between:
No. The does not provide product keys or bypass activation. It provides the same installation media that Microsoft freely distributes. You are legally required to own a valid Windows license (digital license, OEM key, or retail key) to activate the operating system after installation. adguard.net techbench download page
Compare the result with official Microsoft hashes listed online (on MSDN or Microsoft documentation sites). Think of it as a third-party user interface