Confirmation is the final sacrament of Initiation. It is the fulfillment of the promises made in Baptism, and is the beginning of a full life in Jesus Christ. Administered by the bishop or properly commissioned representative (such as a priest or monsignor), this is done through the invocation of the Holy Spirit, the laying on of hands, and the anointing with sacred chrism oils.
This ancient practice harkens back to the time of the Apostles who received the Holy Spirit at Pentecost, setting their hearts ablaze for the Lord, and going out into the world to live the Gospel message.
Typically administered to youth starting in high school, this is a sacrament available to all those who have at least received their Baptism and Holy Communion.