Catholics believe the Sacrament of Confirmation is the supernatural equivalent of the growth process on the natural level. It builds on what was begun in Baptism and what was nourished in Holy Eucharist. It completes the process of initiation into the Christian community, and it matures the soul for the work ahead.
what it does :
Confirmation is the sacrament by which Catholics receive a special outpouring of the Holy Spirit. Through Confirmation, the Holy Spirit gives them the increased ability to practice their Catholic faith in every aspect of their lives and to witness Christ in every situation.