I use https://prnt.sc/ I can capture what I want, and then either save it locally, of sent it straight to an online Photo server, and get a link, to say put in forum or discord.
Beats
PrtScr,
Opening a Image program and saving it.
Then putting it up on some image server manually.
With https://prnt.sc/ I can go from Taking a cropped screen shot, to posting it, in about 5-10 seconds