What is the song rhiannon about?

The song "Rhiannon" by Fleetwood Mac is about a Welsh witch or goddess known as Rhiannon. The lyrics describe her beauty and tell the story of how she was abandoned by her husband, who left her with only her horse and a ring. The song also refers to Rhiannon as a "white witch," which is a term often used to describe a witch who uses her powers for good rather than evil. The music of "Rhiannon" has a folk-rock feel and features an acoustic guitar with a haunting melody. The lyrics combine mystical imagery with a sense of longing and loss, creating a memorable and enduring song that has become one of Fleetwood Mac's most well-known and beloved tracks.