Ok...

First let me say that I have been hunting since my dad let me carry a 20 gauge while squirrel hunting at age 9 so I am not an actual "fawn" in the hunting world. In my 26 years in the field I have no clue what Parallex is when discussing optics. I am looking for a scope for Muledeer and Elk hunting and am thinking of purchasing a Nikon Buckmasters 4 x 14. It says it has side adjustments to compensate for Parallex adjustments. What does this mean?