Repetition can be used to create a sense of rhythm or to emphasize a particular word or phrase. For example, in the poem "The Raven" by Edgar Allan Poe, the word "nevermore" is repeated throughout the poem to create a sense of foreboding and to emphasize the speaker's grief and loss.
Enhancement can be used to add beauty or interest to a poem. For example, in the poem "The Tyger" by William Blake, the use of vivid imagery and figurative language enhances the poem's meaning and creates a sense of awe and wonder.
Both repetition and enhancement can be used effectively in poetry to create a variety of effects and to add depth and meaning to the poem.