Hi Zophy, I guess to answer the question correctly there are some things we need to know in order to get the full picture but I am going to give you a vague answer as what I believe his recomendation is reffering to. I am not sure what bow you are shooting but if it is a blazing fast bow with light arrows your pin sight that has more than 1 pin will be gapped so close that in all reality you arecapable of just using one pin set at 23-25 yards and if you shoot ata target about 15 yards away you will be a touch high but if it is 30 yards you may be a smidge low. Assuming you are going to use 10-20-30 yard increment for your three pin setup. So if youknow the distances pretty close, just having one pin and adjusting the point of impact (bullseye)up or downaccording to the distance in front of or past 23-25 yards you should be pretty close to the kill zone because of the flat trajectory of your blazing fast bow. If you are not shooting an extremely fast bow the three pin setup at 20-30-40 or 15-25-35 yard settings is probably the way to go. Hope i didn't confuse you because I think i confused myself.