According to church teaching, even after sinners are absolved in the confessional and say their Our Fathers or Hail Marys as penance, they still face punishment after death, in Purgatory, before they can enter heaven. In exchange for certain prayers, devotions or pilgrimages in special years, a Catholic can receive an indulgence, which reduces or erases that punishment instantly, with no formal ceremony or sacrament - www.nytimes.com