Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetry in 49:1-27.
These statements made by Jacob to his sons are probably prophecies. These prophecies are concerned with the descendants of each of Jacob's sons who would become the twelve tribes of Israel. (See: [[rc://en/tw/dict/bible/kt/prophet]])
This prophecy indicates Judah will be the ruling tribe of Israel. The future kings of Israel all come from the tribe of Judah. (See: [[rc://en/ta/man/jit/figs-explicit]])