Props are Intrinsic to the Storytelling Process.
Over the years there have been thousands of iconic and memorable props in movies, television and commercials. Imagine the film Castaway without Wilson the volleyball, or Indiana Jones without his whip. Star Wars is not the same without the lightsabers, and Dexter is not as menacing without his knife.
When the work is done well, a single prop can help define a whole character and call to mind an entire story.