Why is the poem important to Robert Walton?

In Mary Shelley's novel "Frankenstein," the poem is not mentioned as being particularly important to Robert Walton. However, the novel does feature a poem written by Samuel Taylor Coleridge called "The Rime of the Ancient Mariner." This poem is recited by the mariner to Walton and his crew during their journey to the North Pole. The mariner's tale of his harrowing experiences serves as a cautionary warning about the dangers of hubris and a reminder of the power of nature.