Definition
A MacGuffin (also spelled 'McGuffin') is a plot device that motivates characters and drives the story forward, but is ultimately unimportant in itself. Think of it as a goal or object that the characters desperately pursue, but its specific details are irrelevant to the audience. Its primary function is to provide a reason for the characters to act and interact. The term was popularized by filmmaker Alfred Hitchcock. It’s all about the chase, not the object itself.