Holy Orders is a Sacrament by which Bishops, Priests and Deacons of the Church are ordained and received the power and grace to perform their sacred duties. When someone is baptised, the person shares in the priesthood of Christ. The priesthood of all the baptised is called common priesthood of the faithful or general priesthood while that of the priest is called the ministerial priesthood.
This Sacrament of Holy Orders makes those who receive it share in the priesthood of Jesus Christ and gives them the power and grace to discharge their duties validly and worthily. The power received in this Sacrament are meant for service of all the baptised imitating Christ who came to serve and not to be served. It is called the Sacrament of Orders because by it, order and organisation are established in the Church.