Poetry is a form of writing in which language is used for its aesthetic and evocative qualities in addition to, or in lieu of, its apparent meaning. Often, though not always, poetry is distinguished by its rhyme, meter, and stylistic elements.
Types of Poetry
A haiku is a form of poetry originating in Japan. In its English equivalent, poems consist of three lines of five, seven, and five syllables, respectively.
The lyrics of Mystik Spiral can be considered poetry (at least as far as they can be considered music), as well as those of various other musicians across the series.
Songfics are fanfics that either consist entirely of lyrics to a song (the lyrics having to do with the Daria show, and the song being a commonly known one such that singing the lyrics is made easier) or are instead a short prose piece interwoven with the lyrics of a well-known song, borrowed for story purposes.
Poetry in Canon
Daria is a fan of Allen Ginsberg's poem "Howl" and made the very bad decision to read it to an old person in "The Old and the Beautiful".
Poetry in Fanworks
A number of authors have written poetry relating to Daria. However, due to the non-narrative nature of poetry, it is not as common as prose.