The clavicle, aka collarbone, is easily palpated and looks quite nice on people with nice shoulders. Its primary significance is that it is the only skeletal contact for the shoulder blade and arm to the axial skeleton - the rest of the body. On the other end it connects to the top of the sternum where the ribs begin. It is strong and stiff, in order to hold them in place and away from the body. You want that so that you can have a maximum range of movement, you know, throw a baseball, reach the stuff on the top shelf. Which is also the reason it is the most commonly broken bone in the body [If you break your clavicle you must wear a tight sling for approximately 3 weeks to hold the bone in place. Otherwise your arm will drag the bone fragment down and you will be forever handicapped and disfigured. Yuck]. The outside end of the clavicle attaches to the acromion process of the scapula. Finally, the clavicle helps protect the nerves running out to the arm.

The above photo is the anterior view.