Shock Compression??!!

[JHF219]

I just got a new(used set) of TCS ZPS shocks they Comp. adjustable can someone please explain to me how i set these what this does for the shocks and so forth so i can get a better understanding of them !??

[RiPPiNiTuP7]

http://www.atving.com/editor/review/accessory/shocks/pep/shocks.htm