The role of a confessor is to listen to the confessions of penitents, offer them spiritual advice, and grant absolution, which is the forgiveness of sins. In the Catholic Church, the confessional is a private room where the penitent can speak to the confessor without being seen or heard by anyone else.
Confession is considered an important sacrament in the Catholic Church, and many Catholics confess their sins on a regular basis. However, confession is not required as frequently in other Christian denominations, and some denominations do not practice it at all.