I assume you've seen this selection chart?:
Tractor Tire Chains-Comparison-Application
As others have said, any type of chain is better no chain. From there, it's pro/cons & trade-offs of each type of chain. (Marring pavement, price, ride, traction, lateral (sidehill) stability/traction, etc..)
I run 4 link ladder chain on my "garden tractor " snowblower that only sees a paved driveway. About as basic as chains come. They work fine-to-great. When I get "off driveway", I tend to run out of rear weight, or lack of diff-lock, before lack of traction (if that makes sense)
I run a non-studded, non-v-bar, "duo grip" on the rear tires of my ~8000lb (w/
ballast, FEL) 4wd tractor. I've never worried about going anywhere with them and they were the right price, plus I wanted "some" sidehill stability more than a ladder type chain, while at same time I wanted the option to sometimes drive on pavement without leaving marks.
As others say: Secure the clasps so they don't come undone.
I think a little loose is better to self clean and not get stuck between tire lugs, but worse for whacking fenders if at a speed where centrifugal force overcomes gravity.
On the garden tractor turf tires, I deflate the tire a bit, put chains on tight and inflate tire afterwards to tighten more.
On utility tractor with loaded tires, I get a 10 ton jack, lift rear tire, and put it in neutral to spin tire to put chain on, and spin a few times more so slack can "equalize" and retighten as necessary.