follow is a utility that is supposed to show you how to setup a simple scene where you must follow someone.
It is not impressing at all. A simple message appears to follow the computer player's scout cavalry, and you do. A trigger system was enabled to stop the unit whenever you are too far away, allowing you to catch up, but the author used an Object Not Visible trigger instead of Bring Object to Object, so it's buggy.
There were no instructions on how to do this, not even a "look at the triggers." In fact, there were no messages but the "follow me!" and even that had a grammatical error. :p
Overall, the trigger system is very simple anyway, and IMO was not worthy to be used in a utility. I can't recommend this utility.