If your main goal is to get your pecs as big as possible it might be better to do bench press variations, as it‘s easier to increase the load here.
Nevertheless the push up comes with a lot of benefits for your shoulder health. As you are not fixed on a bench, you are able to strengthen your serratus (plays an important role for stability of the shoulder blades). This is because your shoulder blade is able to move and doesn‘t have to be retracted all the time.













