You have used something similar to the ScriptData communication in Lesson 23 while using the Pause script. It is something that could be useful if you are doing some complex scripting, but for "ordinary" scripts, you might not need it. I personally have used it only once so it is not something that will be used often, if at all in your scripting adventures.
If this video is causing you issues, here is a copy on YouTube: https://youtu.be/L_awTc4giRU (please, do not share)
The forum thread is here.