A hymnal is a book that contains a collection of hymns, which are religious songs typically sung during worship services. Hymnals are used in various religious traditions, including Christianity, and they often include music notation, lyrics, and sometimes additional information about the hymns' origins or themes. Hymnals serve as a resource for congregations, helping them participate in communal singing and enhancing the worship experience. They can vary in size and content, with some focusing on traditional hymns while others may include contemporary songs. Many churches have their own specific hymnals tailored to their beliefs and practices.