What IS smile and nod?

Here's the Disney, PG-13, edited version

Smile and Nod has always been the answer, whenever faced with one of life's many pickles, tough spots, or situations.  Its what you do, for lack of a more glamorous action, when the camera pans to you.  It is your "go-to" whenever you need a place to say something, or just don't know what to say.
I want to know how I can help you, whether you want me to make your back yard look like an enchanted forest, you suspect your bulldog thinks your an idiot and you need a mediator, or you just need to talk about your addiction to quickie marts.  Whatever I could do, however I can help, please let me know.