Some translations set poetry farther to the right than the rest of the text to show that it is poetry. The ULB does this with the poetry in 2:3-9, 21-23.
Haggai uses an extended metaphor in this chapter related to ritual cleanliness. While the Jews were not unclean by nature as the Gentiles were, their actions made them unclean. (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/tw/dict/bible/kt/clean]])