It was written by Yoon Hyo-sang, Daniel Pandher and Tommy La Verdi for the group's first album, Twins (2005).
The song became their second promotional single for the album after "Twins (Knock Out)", with the first performance of the track taking place on February 12, 2006 on SBS's Inkigayo.
"Miracle" is Super Junior's third performing single after "Twins (Knock Out)" and "Show Me Your Love."
It was also the second song produced by SM Entertainment that topped overseas music charts in Thailand of Channel V, the first being TVXQ's "Rising Sun."
Promotional activities for "Miracle" continued well throughout March and April until the release of their first official single, "U" in May.