Exit screens

Setting Exit Screen to true for a macro screen causes the macro runtime to terminate the macro after it has performed the actions for that macro screen. That is, after the macro runtime performs the actions, and before going on to screen recognition, the macro runtime looks to see if the current macro screen has the exit screen indicator set to true. If so, then the macro runtime terminates the macro. (The macro runtime ignores the <nextscreens> element of an exit screen.)

Therefore you would set Exit Screen to true for a macro screen if you wanted the macro screen to be a termination point for the macro.