Tracking shot

This is a simple movement backwards or forwards usually shot with tracking dolly to insure a smooth shot. Tracking inwards draws the audience into the action while tracking out signifies the end of the action. It puts the focus on a shot on a ceratin detail. The zoom shot is an alternative of the tracking shot if the correct equipment is not to hand and is acheieved simply by ajusting the focul length of a camera. Here is an example http://www.youtube.com/watch?v=oL34nvz2MC4; it brings the focus of the shot onto her smile.