A common question is about posterior cervices.
Cervices (plural of cervix) are mobile in the vagina. They move from front to back, side to side and round and round. Non-pregnant, they tend to stay in the same neighborhood, but in pregnancy, the head's depth can bring the cervix front and center, or the head can come down while the cervix is still posterior (facing more towards the back of the vagina).
When we do a vaginal exam and find a cervix posterior, it means we feel the baby's head first and have to either reach around the head to find the cervical os or sometimes we "walk" the cervix up with our fingers.
One major thing a woman can do to bring her cervix more forward for an exam is to sit on her fists. I have women make a fist and then, keeping them upright, put them under her hips. That position almost always works wonders for finding a posterior cervix. Not always though.
When a woman is in labor, the uterus contracting brings the cervix forward - where it needs to be for the baby to come out. If a woman is having vaginal exams (or doing them herself), it's a pretty good indication of active labor, whether the cervix is anterior (nearer the front) or posterior. Anterior would signal active labor; posterior usually means there's some work still do to. Of course, there are always exceptions! But generally, this is the case.
Before labor, having an anterior or posterior labor has zero indication of anything. Your provider might say it's a great sign for it to be anterior, but I've seen many a posterior cervix in early labor bring a baby out a few hours after that exam. An anterior cervix can take its own sweet time dilating. Before active labor, I'd not give any credence to where the cervix is at all.
As far as I can tell, having the cervix move from posterior to anterior isn't any more work or cause any more pain during labor. Dilating is enough of an attention-getter!
One more point: If people keep their hands out of your vagina, they wouldn't know where your cervix is and it wouldn't matter one iota. The baby comes out. Really.