The zombie head is a decorative block that was added to Minecraft in v1.4.2 in “The Pretty Scary Update”. The head can be worn like a helmet by the player but offers no protection. They can also be placed in the world to act as decoration.
A zombie head (via screenshot)
The only way to obtain a zombie head is by making a creeper blow up and kill a zombie while doing so. When a zombie is killed by a creeper that blows up, it will die and drop a zombie head that can be now picked up by the player.
Zombies in a forest (via screenshot)
The zombie head is an item that can be either used for decoration or worn as a helmet. Zombie heads can be placed on walls or on top of blocks as decoration. It can also be worn by the player, but it is only cosmetic as it offers no protection to the player.
A player wearing a zombie head (via screenshot)
The zombie head is a collectible item that is used by players for decorating their homes or can be worn on their heads as a helmet.
A. To get a zombie head you will need a charged creeper to blow up a zombie.
A. A zombie head will not protect the player as it is merely a cosmetic item.