90 % of all my hunting knives (Skinners) are hollow ground. Theoretically there is less restriction slicing through meat or skinning since the only thing that touches the area is the cutting edge of the knife, with a partial or flat grind the side of the blade drags against the area being cut which causes drag. Just think on how straight razors are made, they are hollow because the only thing you want touching the hair is the cutting edge. Each grind has it's positive or negatives. A hollow ground blade is certainly not as strong as a flat grind, convex or scandi grind, there are trade offs for each specific grind. All of my kitchen knives are a convex grind because there might be some bone chopping involved.... regardless of the grind, the key to any blade is the heat treat a temper, that is the heart and soul of a knife.
Hollow grinds are done on a wheel, flat and scandi grinds on done an a flat platen, my convex grinds are done on my slack belt grinder.
All hollow grinds are not created equal, depending on the blade and it's intended purpose I use various wheels for hollow grinds, I use a 2", 4" 5" 8" and 12" wheel.
A hollow ground blade is sort of a concave grind to the bevel of the blade. What that does is make it easier to sharpen as it dulls because there is less material to deal with, due to the concave sort of a grind. Also less friction for certain stuff.
The trade off is a hollow grind is not as strong.
Kind of like a clip point stabs/jabs easier but is weaker, while a drop point is far stronger and you can pry at stuff with it. Like the portin of a cape around the antlers. Kiss a hollow grind clip point goodbye hehe.
Here are a couple picture to illustrate the difference from the three types of grind I am most familiar with, hollow, flar, and convex. Hollow is an odd name in my opinion, I always thought of it as convex.
Theres a dozen other different kind of grinds but I can't get that far into it without consulting the googles and I am not in the mood. So here's the layman's guide, from just a layman.
Nothing better than a good hollow grind on a user knife (unless its a chopper)! I hollow grind all of my knives unless someone specifically asks for a flat grind...