For me personally it’s in dark reception or ceremony halls. Specifically when people are moving around and I need my shutter speed to stay fast.
With a still picture, I don’t usually use it because I can instruct the people to stay still for a second longer, etc. and just use my tripod with a longer shutter.
:lol
How did I not follow directions?
If I just posted a pic, would you know what lens I have on it? lol.