How did valkyries help odin?

Valkyries served Odin by selecting slain warriors from the battlefield and guiding them to Valhalla, his hall of the slain. They ensured that the bravest souls would join Odin's ranks in preparation for Ragnarok, the final battle. By doing so, valkyries not only honored fallen heroes but also reinforced Odin's power and influence among the gods and warriors. Their role was crucial in maintaining the cycle of valor and glory central to Norse mythology.