evening everyone. can someone please post a link or explain to me exactly what "cam lean" is??

the reason i ask is because the serving at the end of my zebra string is showing signs of wear. it's where it attaches to the cam (the loop of string wrapped with serving) i know from pulling the bow back that the cams do lean but i don't know if this is good or bad or even if they are supposed to do that?? i shoot a reflex growler. 27.5 draw, set at 52lb.

thanks.

Phirst