Piglins are gold-obsessed inhabitants of the Nether in Minecraft, known for their whimsical dance moves and unpredictable nature, alternating between friendliness and aggression. Mojang's presentation explores their origins, bartering system, and reasons for hostile behavior, particularly their tendency to attack on sight. They inhabit the Nether, especially around bastion remnants, and are fiercely territorial, ready to defend their domain against intruders.