Catechism of the Catholic Church
“‘Do this in memory of me’ The command of Jesus to repeat his actions and words ‘until he comes’ does not only ask us to remember Jesus and what he did. It is directed at the liturgical celebration, by the apostles and their successors, of the memorial of Christ, of his life, of his death, of his Resurrection, and of his intercession in the presence of the Father.“
Source: Catechism of the Catholic Church #1341