The whole topic of color management can get pretty dry and technical, but stick with it because there’s information here that’s useful and puts lots of other things in context.
Printer profile
Printers do not necessarily reproduce colors accurately, especially if you use third-party inks or papers rather than the printer maker's own. A printer profile is used as part of a color managed workflow to send 'corrected' colors to the printer so that the prints match the colors on your screen and those captured by the camera.