Meanings?

It might help to understand the commandment of Jesus to be baptized and show and make a public profession of faith

"We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life." ( Romans 6:4)

Water baptism is a way to visually preach the gospel. Standing in the water symbolizes a Jesus dying on the cross, immersing in the water symbolizes Jesus being buried in the tomb and being raised from the water symbolizes Jesus rising from the dead. We bury the ‘old life,’ and we rise to walk in a ‘new life’.