They originate from Jewish folklore, specifically, but in general, a golem is an anthropomorphized being created from inanimate matter, usually earth related. Think marble, granite, or clay.

[She pauses to pick up one of the teddy bears that might have fallen on the ground, moving around its arms as she explains.]

For "us," golems are servile tools and usually not much else. They'll have a core that houses the energy needed for it to move and to obey the commands that its creator has etched on its surface. That energy runs out eventually or when its commands are fulfilled, it shuts down and just becomes rock again.

[A beat.]

Oren's a golem. But he's the only one of his kind because my grandmother was the one who created him.