Don’t just place your palms on the ground and forget about them. Spread your fingers out as wide as you can.
Grip the floor with your hands and simultaneously drive your palms down and twist them outward as if you were trying to rip the floor between them. Your elbows and biceps should rotate so that they face forward.
This helps provide more stability in your shoulders and tension throughout your whole body, so you’ll be more solid throughout your pushup.