What clothing you take off during the day, in meetings, while presenting, while working at your computer, matters.
Taking off a tie, a jacket and rolling up your sleeves signifies getting down to business.
It’s so ingrained we even have it in our language. So pay attention to what you take off when. Since most corporate workplaces are air conditioned now, you can be fully dressed with jacket all the time.
Then when you do take off your jacket, it means something.
See the first 9 seconds of this video from West Wing: the same applies in organisations!