what is an s-trig to1/4" cable used for?

i just got one of these with a micro i purchased. what on earth might i use this for?

If you plug in the s-trig into your micro, you can plug the 1/4" phone plug into a latched pedal to turn on and off the s-trig function (i.e., to hold notes indefinitely). That’s how I used it on my mini.