The Mass is the highest form of Christian charity. 

It represents the perfect sacrifice of Calvary, and so it is the priest’s essential duty and his greatest honor to offer Holy Mass. In all ages, the Christian faithful have traditionally offered alms for the celebration of the Mass, for the support of the priest and the maintenance of the church where the sacred rites are celebrated.

The faithful may request that Mass be offered for a special intention, often for another individual, living or deceased.

It is not necessary for the celebrant to announce the Mass intention in order for the Mass to be offered for the donor's intention.