Hymnals are books that contain collections of hymns, which are religious songs typically sung during worship services. They serve as a guide for congregations, providing the lyrics and often musical notation for each hymn. Hymnals are commonly used in various religious traditions, including Christianity, where they play a significant role in enhancing the worship experience. These books can vary in content, featuring traditional hymns, contemporary songs, and sometimes prayers or scripture passages. Many denominations have their own specific hymnals, such as the United Methodist Hymnal or the Catholic Hymnal, reflecting their unique beliefs and practices in worship.