What did Athena give Greeks the olive tree?

Athena gifted the olive tree to the Greeks as a symbol of peace and prosperity during her contest with Poseidon for the patronage of Athens. The olive tree provided various resources, including food, oil, and wood, which were essential for the city's development. This gift was seen as more valuable than Poseidon's offering of a saltwater spring, solidifying Athena's status as the protector and deity of the city. The olive tree became a lasting symbol of Athenian culture and identity.