I think this question has been asked before. Now that thread should be buried under the million of posts by all our GR forum members (Technospaz contributed large portion of them
If I don't remember wrongly Kick point is a term used in olden days for olden clubs. Nowadays shafts have a bend profile. The terms Kick point and bend profile may be used interchangeably.
All shafts have a kick point, be it low, mid or high, or something inbetween one of the other depending on the manufacturer. Low kick is nearer to the club head while high kick is nearer towards 4-6 inches from grip area.
For the science of it, please consult the resident club fitter. I only know what it does. Low kick point lets you get the ball up in the air faster and easier. Mid kick and high kick shafts tend to give me low ball flight with alot of roll. That's why even though I play a 10° driver (too low for me), with a low kick shaft I am still able to get it up and get some distance out of it. My average swing speed is about 90mph. I've been taught not to "kill" the ball so usually I swing slow.
Anyway, I'm not a long driver of the ball so if you want to get loads of distance talk to the relevant people. In yesterday's flight I was the shortest driver. Mr Lam, Mr Roger and Mr Hard%ock all out drove me....