having the bow tuned is archery terminoligy for having the arrow rest in a strait line with the string square with the bow and in line with the nock travel of the string paper tuning plays a part to help indicate whether the rest is properly aligned by shooting from a distance of 6 feet through preferably masking paper the type of hole the arrow leaves through paper will indicate whether the rest is properly aligned or not.

once this is acomplished comes another Phaze of the tuning process
sighting in the bow often referred to as walk back tuning this is basically how it is done you start at20 yards and set your top pin for that distance then walk back to 30 yards then set your next pin down to that distancethen to 40 yards and set the next pin for that distance ect
I hope that was simple enough

the bow shop Can tune your bow but they cant tune you so you will have to adapt to the bow not the bow to you.