it's a test of a sample of cells taken from a woman's cervix. its done during a pelvic exam. I have had lots of pap smear over the years and while they can be quite uncomfortable, they are very helpful in determining reproductive health and wellness.
they can be uncomfortable especially when the speculum is inserted into the vagina...and i always found the clinking of the instruments well weird! but it is something we as women have to put up with to ensure our reproductive health!
its a fairly quick procedure too, around 15 minutes. for first timers it can be weird having someone's face looking down there, but after a while you don't think about it. doctors are quite good at putting their patients at ease.