Why does Odysseus tell the cyclops that he is nobody?

Odysseus tells the Cyclops Polyphemus that his name is "Nobody" to cleverly protect himself and his men. When he later blinds Polyphemus, the Cyclops calls for help, saying that "Nobody" is attacking him, leading the other Cyclopes to believe he is not in danger. This quick thinking allows Odysseus and his crew to escape without further retaliation from the other Cyclopes. The tactic highlights Odysseus's cunning nature and strategic intelligence in dire situations.