It's a finish.
HA! I'm just kidding... I can tell you more about it.
So, PVD is a lifetime finish that is ideal for exterior doors as well as coastal climates. It is built to last for years through all the outdoor elements.
As you can see in the picture, it is a polished brass color, but if you aren't a polished brass fan, Baldwin offers all kinds of Lifetime finishes.
So if you are looking for a kickplate or nice looking handleset for your exterior door, go with the PVD or a lifetime finish!