Sparring is the closest thing to a real fight, without actually fighting. It will help you gain a better grasp of the correct use of the skill and techniques how to utilize them in terms of distance and reach, timing and rhythm, and in different degrees of power.
 
As a beginner in kickboxing, sparring can be a little daunting. But there comes a point in your training when you reach a certain level. Your skills become sound, your technique, fluid.  Generally, sparring should be introduced after about 3-4 solid months of consistent training. Ideally, you will want to have the fundamentals incorporated into your training routine, at the very least.