Baptism into The Church of Jesus Christ of Latter-day Saints requires full immersion in water by a person who holds the priesthood authority to baptize. It is the means by which people join the Church. Those who are baptized into the Church are cleansed of their previous sins and placed under covenant to live the principles of the gospel.
A person becomes a member of the Church only after they are both baptized and confirmed. A person is confirmed a member of the Church after baptism by a priesthood holder who puts his hands on the head of the person and blesses him or her to “receive the Holy Ghost.”