>>1241848So, well, trolls in Norse mythology and in Norse folk tales refer to sorta different things.
In folk tales, they refer to these large bipedal creatures that live in forests and mountains. They're often seen with large noses, tails and sometimes even several heads. In some tales, they can become so old and so large that moss and sometimes even trees grow on them. Pic related.
They're also sometimes described as large but closer to human size. This troll variant is a common character in fairy tales, and function as adversaries or obstacles to the hero. These trolls might be seen as evil or greedy, but it's not necessary, as they sometimes have entire communities down in their mountain caves. Here they collect gold and riches, and keep various pets. They sometimes even lure beautiful women down there where they'll have to stay forever as the troll's bride, which leads to the Norwegian word for magic, "trolldom". Not kidding. It's also a word for being in love with someone, "bergtatt", which means "mountain-taken".