Liturgy (Greek: λειτουργία) is the customary public worship done by a specific religious group, according to its particular beliefs, customs and traditions.The word, sometimes rendered by its English translation "service", may refer to an elaborate formal ritual such as the Eastern Orthodox Divine Liturgy (Greek: Θεία Λειτουργία), Catholic Mass, the Eucharist or Mass (Anglican Communion) or a daily activity such as the Muslim salat and Jewish services.