They will fiercely protect villagers from anyone who would seek to do them harm. These colossal mobs can deal significant amounts of damage and can withstand taking a bunch of damage as well.

What happens if you give an iron golem a flower?

They could even give your flower to other players and villagers. This would be useful for players who want to get on the good side of the village without trading that much. But if you offer the Iron Golem a Wither Rose, the Iron Golem would receive the effect and become angry, causing it to attack you.

What happens when an iron golem dies?

If the village golem dies inside of the village, when the next bell gathering happens (yes, bell gatherings are a part of the programmed behavior of the villagers), the villagers should go to the block where the last village golem died and one of them would place a poppy.