What body type are you?

There are three types of bodies, each body reacts differently to training and nutrition while bodybuilding.
Ectomorph is if your body is very slim (Skinny) and small boned with hips and shoulders about the same size. You can can gain definition easily but it is difficult to increase muscle mass.
Mesomorph is if you have large bones and shoulders that are wider than your hips, you will be better at gaining muscle.
Endomorph is if your curvy, large boned, hips wider than your shoulders with a nice store of fat. It is possible to tone and shape but it will be a lot harder work.