@Robbie-Hoskins, if you leave the Off Command field blank, the command in the Command field will run with on or off as the parameter depending on whether you say "turn on" or "turn off."
If you don't want to use the on/off parameters, you could fill in the Off Command field. Then it will run the command in the Command field when you say "turn on" and the command in the Off Command field when you say "turn off."
Here's an example where I'm running two completely different commands for on and off.
89ca17b5-100e-4ec0-8c37-07c9862e1408-image.png
I hope this answers you question, but I'm not sure.