The ability to set the number of licenses on hand for an application and track the number in use.
Example:
We have 20 Power PDF licenses so I would put 20 in the license count.
Every user or device (selectable when setting up the license field for the software asset based on how the license is used) that I link that software to reduces the count of available licenses by one
The software asset would have two numbers in the license count field; total and available