dumb question.. about compression ratio

What exactly does lowering ur compression ratio do?
i know its a dumb question but I no absolutely nothing about turbos and I really want to get one installed on my 95 vtec prelude

Static compression ratio(what most are referring to when they say "compression ratio) is the volume your piston displaces over the volume of the chamber with the piston at the top of the bore. I went into detail about what exactly lowering your compression ratio to run more boost will gain you here:
http://www.automotiveforums.com/vbulletin/showthread.php?t=195505