Randolph the Red-Nosed Reindeer is a song that was written in 1939 by Johnny Marks. It tells the story of a reindeer named Rudolph who has a very shiny nose. The song became popular in the 1940s and has been covered by many different artists since then. In the song, Rudolph helps Santa Claus find his way through a foggy Christmas Eve by using his bright nose as a beacon. The song has become a holiday classic and is often played during the holiday season.