Golems are minor bosses and rare enemies in Elden Ring. They are gigantic stone humanoids with a burning furnace inside their chests. One variant has a giant bow, while the other a giant halberd. Both can spew fire from their chest. Some have armored ankles that makes from more resilient against being knocked over.
There is a secret magic Golem just above the arena where Starscourge Radahn is that is arguably harder them most bosses in the game. It has various unique magical attacks and a huge life pool. No unique rewards are given, and the runes it drops is miniscule