Dips is a compound chest movement,period. It involves the whole
pec area,the front delts and tris.Auxiliary muscles worked include
the other 2 heads of the delts and the upper back(traps,lats
etc)
Well,when I mean dips,I mean the kind when your two hands are on
two parallel bars and your legs are dangling in the air.
Not the kind of dips when you can rest your heels on the
floor/bench.
You go try dips and see how many you can do...There is this case of
a 250lb BB who bench press 400lb but struggled to do dips when he
first tried it for the first time...Generally the harder the
exercise,the better it is. Exercises which make your torso move
through space are the best. Read dips,pull ups, squats and
deadlifts. In the bench press,only your arms are moving...