Answer:
Homer reminds us with the prophecy of the blind prophet Terisias about the quest that Odysseus has to embark on after his return to Ithaca. This is to reveal to us, the readers that the story of Odysseus' journey at sea doesn't end and that there is another tale to be told. It also tells us when Odysseus will die, i.e, after the quest and he's done sacrificing how he had been advised by Tiresias.
Step-by-step explanation:
The prophecy of the blind prophet Tiresias about the quest of Odysseus after his return to Ithaca and also of his death. This prophecy is not only to tell the readers that there is more in store after the ending of the story and also that Odysseus had to do things to make sure he and his family can live a happy life. The prophecy also talks about Odysseus' death, before which he had to finish the quest that was prophesied by Tiresias.
Chapter XXIII shows Odysseus revealing to Penelope about the prophecy and why he needed to finish it. Penelope also complies with the plan, agreeing "If the gods are going to vouchsafe you a happier time in your old age, you may hope then to have some respite from misfortune". Thus, Tiresias' prophecy about the quest of Odyssey is to remind us that the end of the story does not really signify the end for Odysseus.