The acolyte is appointed in order to aid the deacon and to minister to the priest. It is his duty therefore to attend to the service of the altar and to assist the deacon and the priest in liturgical celebrations, especially in the celebration of Mass … He may also, to the extent needed, take care of instructing other faithful who on a temporary basis are appointed to assist the priest or deacon in liturgical celebrations by carrying the missal, cross, candles, etc., or by performing other such duties. He will perform these functions more worthily if he participates in the holy Eucharist with increasingly fervent devotion, receives nourishment from it, and deepens his knowledge about it.

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Ref: Kosloski, P. (2019, November 4). What is an Acolytes in a Catholic Church. https://aleteia.org/2019/04/11/what-is-an-acolyte-in-the-catholic-church/