Guide setting ms

hello someone could insert a demo video or an image of how to set “MS” in the mouse for macros? I have mouse corsair scimitar rbg pro with icue software, I already know how to put macros but I do not understand why if I set the macro so :

foto 2

and I manually press the button at 100 ms it works one way, if I put the macro with on/off at 100 ms it works much faster anyway why?

Could someone please answer?