A motif is a recurring element or theme in a work of literature, including poetry. It is used to add depth and meaning to the poem, as well as to create a sense of unity throughout the work. Motifs can be used to explore a particular idea, symbolize a character or situation, or create a specific atmosphere or tone. They can also be used to connect different parts of a poem or a collection of poems. Additionally, motifs can be used to add layers of meaning to a poem, making it more complex and interesting to the reader. Overall, motifs are used to establish and strengthen the overall meaning and message of a poem.