I used a trolling motor for my new jon boat this summer (my first boat), but I am considering buying an outboard before next spring. So I've been looking around at some motors and accessories and saw these jack plates. This may be a stupid question for most... but what exactly does a jack plate do? I mean other then mounting your motor to it. Obviously people use these instead of mounting directly to the transom... I am just wondering why? Thanks for the help.