An asset is any scanned domain name, IP address, or hostname. For example, if you scan a top-level domain (ie. test.com) and 88 sub-domains are discovered and scanned, that would be a total of 89 assets.
A workspace is a logical grouping or alias (like a folder) where you store assets/targets. It can be anything you designate (ie. my_workspace, etc.).
A licensed system is any system you install Sn1per Professional or Sn1per Enterprise on. You can only install Sn1per on a single system.
If you want to install Sn1per on multiple systems simultaneously, you will need to purchase a license for each system.
If you need to change the system where Sn1per is installed, you can run the uninstall script on the existing system and re-run the activation script on the new system to transfer the license. See our documentation for more details.