If your looking for a hard looking well rounded physique, building your chest muscles should be a priority. There are plenty of exercises that target your chest however time under tension and muscle overload will be the key to growing your chest.
How this overload and consistent tension is best applied can vary from individual to individual as some feel their chest get a better contraction when performing pushing movements like a bench press and other feel it better when performing flying movements like a cable pec fly. The key is to get yourself a well rounded chest program and figure out the best ways you feel your pecs contracting and tightening up and really focusing in on the tension.
Once you have done this the key to grow your chest will be to overload the muscles week to week through varying your weights and rep ranges so that your chest is constantly being shocked into growth!!