To build muscle, the nervous system needs to fire at full speed to maximize fast-twitch muscle fiber recruitment. After all, you can't train the muscle fibers that aren't "turned on."
Adding an explosive component to your chest training, like the clap push-up, improves muscle fiber recruitment for the rest of your workout. The more muscle fibers we stimulate in training, the greater the growth potential from a workout.
Focus on generating as much power as possible on each rep. Do 3 sets of 5-8 reps before your primary chest exercises.