This property sets the scope, i.e. the visibility, of a persistent variable. It takes a numerical value from 1 - 3. Any other values will be ignored.
If you omit this property the default scope is used, which is the user scope. in case you use the persistent variables with a call routing script. If you use them outside of a call routing script (new in v1.1.0) the default scope is the global scope.
Dim MyVariable Set MyVariable = new PersistentVariable MyVariable.Name = "Welcome" MyVariable.Scope = SCOPE_GLOBAL
The above example set the scope of the persistent variable Welcome to global, meaning that this variable is visible and accessible from all scripts of all users.