It means exactly what it states.
I've hunted big water to mud puddles for waterfowl in 9 states in almost 43 years of waterfowlingwith 90% of that oe public waters. Make an investment in quality decoys once and own them for a lifetime. If you do you'll find one doesn't need the lastest wizbang offerings from 3 1/2" shells to mojo's and super mags.