Wait is a lot like stay, only your dog doesn't have to be still. Wait means: don't go past a certain point.
You might use wait if you want your dog to stay in the kitchen while you go to the living room. With the 'wait' command, your dog can move anywhere in the kitchen, but cannot leave.
Think carefully about whether you want your dog to stay (don't move a muscle!) or wait (you can move, but don't follow me!) Some situations require that you tell him to stay and some require that he wait.
Here's how to teach the 'wait':
Let's say you want your dog to stay in the kitchen, and you
don't want him to go into the living room, which is right next
to it.