1989 P Dime Error?

I have come across this dime looks like an error in the way its stamped or however. You cant tell from the photo much because of my shoddy camera, but the date tappers off at the ending 9 where also the large ring does as well, around to the first words in And we do also, but trust and God is fine. The back side top part of united states seems to be a little smushed I guess you could say, either way it goes, what does it mean to have an error coin? any thoughts opinions or help is appreciated very much