Altar servers assist the priest during the Mass. This is an important ministry which enhances the celebration of Mass. By serving at the Altar and assisting the priest, Altar servers have the opportunity to celebrate the Mass with more active participation.
Youth altar service is open to boys and girls who already had their First Communion. They assist at Sunday Mass, for weddings and other celebrations while adult altar servers serve in our funeral masses. Trainings will be provided to new altar servers.
Why should we encourage our children to be altar servers? (aleteia.org)