This is a great movement for avoiding pec tears if you are training for maximum bench press strength. It stretches the pecs out ( I am sure you have been doing enough of that), brings nutrients to the pec region, and strengthens the insertion.
To do this set up your Incline bench at an angle that allows you to keep your chest high. Imagine a string attached to your sternum that is pulling your chest up to the celling. Keep a slight bend to the elbow ( I actually like more bend that most recommend because it keeps the stress off the front delts. Grab a cable handle in each hand and get set on the bench with you chest high. Begin with the handles in front of you directly in front of your chin (or where you feel the tightest pec contraction). To begin lower the handles to the sides as if you were trying to stretch you pecs out. When you reach your peak stretch position return to start. Do not over stretch.
This seems to work better for most in a higher repetition range (12-15) for multiple sets (3-4)