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.
The potter and the clay are important images used in Scripture. They emphasize the power and control of God. This chapter connects this to the truth that Yahweh is the creator of all, which it repeatedly emphasizes. He is even able to "anoint" or chose a future, pagan king. (See: [[rc://en/tw/dict/bible/kt/anoint]])