There are different kinds of focus, and this one is all about eye contact. It is simple to train and just takes a bit of practice to build up duration for this trick.

Criteria
Focus (hold eye contact 6 seconds): Dog will hold eye contact with the handler for 6 seconds. Handler may cue the dog 1 or 2 verbal cues during the 6 seconds. If submitted by video, make sure the handler’s face is visible.