The Execute a Subroutine action allows you to execute another macro like a subroutine, optionally passing parameters in and receiving a result in return. The sub-macro will be executed, and when it is finished, execution will continue on from after this action.
The target macro defines the parameters via the Subroutine trigger, and you specify the values for those parameters in this action.
If the macro returns a value, then you can also
ExtraSearchTags: Run Macro, Run a Macro, Call Macro, Sub Macro