A myth is a traditional story, believed to be true by the culture or cultures it comes from, which uses the supernatural to interpret natural events and to explain the nature of the universe and humanity. It has its roots in the primitive folk-beliefs of cultures.
Folklore is the ethnographic concept of the tales, legends, or superstitions current among a particular population, a part of the oral history of a particular culture. The academic study of folklore is known as folkloristics.
A fairy tale is a story featuring folkloric characters such as fairies, goblins, elves, trolls, giants, and others. The fairy tale is a sub-class of the folktale.