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 this chapter.
Yahweh tells the people to present their best arguments in favor of honoring their idols. In this Yahweh challenges the people. Yahweh mocks or insults these false gods because they are not real and have no power. (See: [[rc://en/tw/dict/bible/kt/falsegod]])