Example:
Fat black bucks in a wine-barrel room
Barrel-house kings, with feet unstable,
Sagged and reeled and pounded on the table,
Pounded on the table,
Beat an empty barrel with the handle of a broom,
Hard as they were able
Boom, boom, BOOM,
With a silk umbrella and the handle of a broom,
Boomlay, boomlay, boomlay, BOOM.
Significance: we use rhythm to get it tune with the poem. We use in in almost every poem that we read.