In the Rite of Confirmation, the Bishop (or a Priest who represents the Bishop) extends his hands over you and asks the Holy Spirit to come to you with seven special graces, or gifts: wisdom, understanding, right judgment, courage, knowledge, reverence, and wonder & awe.
Confirmation is the sacrament whereby God completes the graces of a person’s baptism and deepens His seal within them, marking them as belonging to Him (2 Corinthians 1:22, Ephesians 1:13-14). When received within a life of faith, the outpouring of the Holy Spirit through confirmation empowers us to live the Christian life, which we simply couldn’t do otherwise. Thus, it is not a person’s “adult choice to be Catholic”, rather it is God who chooses us, and we can then choose Him day by day.
By the sacrament of Confirmation, the baptized are more perfectly bound to the Church and are enriched with a special strength of the Holy Spirit. Hence they are, as true witnesses of Christ, more strictly obliged to spread and defend the faith by word and deed. – CCC 1285