Say the Rosary is a traditional Catholic prayer practice that involves reciting a series of prayers while meditating on the life of Jesus Christ. It is composed of fifteen decades of Hail Marys, each decade preceded by an Our Father and followed by a Glory Be. The Rosary is often prayed in a group setting, with one person leading the prayers and the others joining in. Praying the Rosary is believed to bring spiritual blessings and peace to those who participate.