The (story) is traditionally recited by married women during the Hindu month of Shravan to seek a long life for their husbands and marital prosperity. You can find several PDF resources for the ritual procedure and the story in various languages: PDF Resources for Mangala Gauri Vrat
Recite or listen to the Mangala Gauri Vrat Katha to complete the ritual. 4. Fasting Rules mangala gauri vrat katha pdf