TC on or off?

Good morning all of you sick-azz mf'ers!!!! I have a traction control question. I have read a previous post about turning off the TC in the snow. First, how is that done? I looked in the manual, but I couldn't find how to. Second. Why? I'm sure most turn it off to have more control, but doesn't the TC do a good job.

Hold the TC button in for about 5 seconds and it will turn off

Thanks. I'm assuming that this needs to be done everytime the vehicle is started.

That is correct

Thanks!