Being an altar server typically refers to serving at the altar during religious services, particularly in the Catholic Church. Altar servers assist the priest in various aspects of the liturgy, such as carrying the cross or candles, holding the book for the priest to read from, and setting up the altar for the Eucharist.

Altar serving is often seen as a way for young people to participate more fully in the liturgy and to deepen their faith. It can also be a way for them to develop leadership skills and a sense of responsibility. Altar servers are typically trained by experienced servers or by the priest.

Altar serving is not limited to the Catholic Church, however. Many other Christian denominations also have altar servers or similar roles, such as acolytes or crucifers. The specific duties and requirements for these roles may vary depending on the denomination and the individual church.