It can be used in various ways:
Figuratively:
* Describing a person: "She was poetry in motion as she glided across the dance floor."
* Describing an object: "The sleek car was a piece of poetry in motion."
* Describing a natural phenomenon: "The cascading waterfall was poetry in motion."
Literally:
* A type of public transportation advertisement: In the US, there is a program called "Poetry in Motion" where poems are displayed on public transit. This adds a touch of art and beauty to everyday commutes.
Essentially, "poetry in motion" emphasizes the beauty and grace of movement, whether it's a human, an object, or a natural phenomenon.