Hey,
A "tag" is the sound that plays as you change the fonts so you know what each is.
There is a multi-color effect that plays each time you change to the next font.
I would suggest changing that to just the main blade color of the Font so it's easier to tell. Not sure why they gave each the same multi-color effect so you need to remember what color each font is.
As for the Force, it's just that - when you make a certain Motion, I think the sound is meant to be like a "Force Push" or something.
At least, that's what I'll be doing with it eventually.
Hope that helps!