Decline push-ups focus more on your upper chest and front of your shoulders.
To perform this exercise, Place your feet on an elevated surface, Keep your body in a straight position and don’t let your low back sag or your hips rise upward. While coming down, touch the ground with your nose, not your chest, because touching the ground with your chest can lead to an arched back.
Decline Push-ups are more challenging than Normal Push-ups. It is an excellent Bodyweight Upper Chest workout that you should do to build your upper chest.
The more you elevate your feet from the ground, the harder this exercise gets, and it will target the shoulder area more instead of the chest.
So, do not elevate your feet too much because it will become a Shoulder dominant move.