Can someone explain to me how this private rule work?

[csteele]

Rule Machine Global Variables

Rule Machine Global Variables [Beta] In response to community requests, we have added Global Variables to Rule Machine. This new feature is a beta release. There is preliminary functionality within a framework. We're looking for feedback as to additional functionality that is needed. Creating Global Variables Before you can use a Global Variable you must first create it in the Rule Machine app. There are four types: Number, Decimal, String and Boolean. Numbers are integer values, while…