What does "PR" mean in front of contact location?

Ok, so I just looked and verified that only the letter P Stands for primary in settings under cellular when you’re

fireguy_6364 wrote:

are they contacts marked as your favorites or anything? could it stand for priority as in their messages always get pushed through? taking a swing for the fence here…

 

but it isnt on all contacts right? do you by chance know if the PR is marked on all the Iphone contacts?

 NOpe just his so far that I’ve found.

alyssa35M wrote:

This is also my boyfriend's contact that it's popped up in so I'm fully aware that this is not something that's been under his contact info, until recently. So it's most definitely something new 

deciding if your cellular number is primary, if you have dual sims you can label the other sim secondary, personal, etc.. you're just labeling your number. The PR that I'm referring to is in my phone under a friends contact that I have saved, it's where you'd put other messaging apps for this person in your contacts, say they had FACEBOOK, instagram, Snapchat, messenger, all in that category. Just another way to reach them and all their social media apps I suppose. 

This photo is of "Primary" is in the Cellular tab under settings, I don't believe it has anything to do with what I'm trying to figure out.  This next photo is also in cellular where it shows only the P labeling my number as "primary" which has always been set to that. I hope I'm making some sense lol. 
 

I highlighted the P, not PR, pink so you could get a visual if it. Hopefully that helps someone but still trying to figure out my the PR a contact of mine, on my phone has labeled under