In Christian denominations that practice infant baptism, confirmation is seen as the sealing of the covenant created in baptism. Those being confirmed are known as confirmands. For adults, it is an affirmation of belief.
Roman Catholicism, Eastern Catholicism, Eastern Orthodoxy and Oriental Orthodoxy view confirmation as a sacrament. In the East it is conferred immediately after baptism. In the West, this practice is usually followed when adults are baptized, but in the case of infants not in danger of death it is administered, ordinarily by a bishop, only when the child reaches the age of reason or early adolescence. Among those Christians who practice teen-aged confirmation, the practice may be perceived, secondarily, as a "coming of age" rite.
In many Protestant denominations, such as the Anglican, Lutheran, Methodist and Reformed traditions, confirmation is a rite that often includes a profession of faith by an already baptized person. Confirmation is required by Lutherans, Anglicans and other traditional Protestant denominations for full membership in the respective church. In Catholic theology, by contrast, it is the sacrament of baptism that confers membership, while "reception of the sacrament of Confirmation is necessary for the completion of baptismal grace". The Catholic and Methodist denominations teach that in confirmation, the Holy Spirit strengthens a baptized individual for his/her faith journey.
Confirmation is not practiced in Baptist, Anabaptist and other groups that teach believer's baptism. Thus, the sacrament or rite of confirmation is administered to those being received from those aforementioned groups, in addition to those converts from non-Christian religions. The Church of Jesus Christ of Latter-day Saints does not practice infant baptism, but individuals can be baptized after they reach the "age of accountability". Confirmation in the LDS Church occurs shortly following baptism, which is not considered complete or fully efficacious until confirmation is received.