Baptism is one of the Seven Sacraments of the Catholic Church; frequently called the "first sacrament" as it is the gateway to the rest of the sacraments.
Through Baptism we are freed from sin and reborn as children of God; we become members of the mystical body of Christ, are incorporated into the Church and made sharers in her mission: "Baptism is the sacrament of regeneration through water in the word. (CCC: 1213)"
In the Western or Latin Church, baptism is usually conferred by an authorized minister by pouring water three times on the recipient's head, while reciting the baptismal formula: "I baptize you in the name of the Father and of the Son and of the Holy Spirit" (cf. Matthew 28:19).