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I wouldn't try and answer that being that I am in Florida, but I would imagine it to mean just that, "private land" as opposed to WMA's , National Forest and State Forest and Parks. Just my opinion though.
From the books that I have read, there is a lot of importance in knowing every nook and cranny of your hunting territory as well as the animal that you are hunting. So scouting as much as possible, just walking the land, will give you a good idea of what's around the corner or what's on the other side of a hill. Which can be very beneficial.
Making your own maps of human and deer trails, and different types of foliage such as group of pines,...