Hi. Maybe a stupid question but does this do exactly? Thank you in advance
No doubt, it was a stupid question.

It maybe but I'm new to this concept. But I'm sure shroomskit can help with the answer
You can head to
https://www.ardorplatform.org to read the basics, and also to
https://jelurida.com for information from the developers and demo nodes. But essentially Ardor is a new platform that will allow users to create custom blockchains including some or all of the existing features in Nxt, and any other new features that may be added down the road.