
Conformation is the way the dog is made up - how all the skeletal bits fit together. It's one thing that makes one breed different from any other.
The angles of the shoulder/upper arm, the rear angulation, how the neck fits into the shoulders, the length and depth of the body, the topline, the tail set, - all these, among others, are part of conformation.
The most important part of conformation is balance.
HTH
Debs