Rhythm

Definition: To emphasise a certain word or phrase throughout the poem, creating a pattern.

Example:
I hear the sound I love, the song of the human voice,
I hear all sounds running together, combined, fused, or following,
Sounds of the city and sounds out of the city, sounds of the day and night,
Talkative young ones to those that like them, the loud laugh of work-people at their meals...

Significance: Poets use rhythm in their poems to get the meaning or attitude across more effectively.

 ha rhythm in poetry :D