What's so important about baptism? When a baby is baptized at birth will that person automatically go to heaven when they die? What does the Bible say about baptism?

We, at Harmony, believe the whole Bible is the holy, inspired, word of God.  We confess in accordance with Holy Scripture and with the Holy Spirit’s help, that Jesus Christ is the one and only Son of God. Confession of Jesus as the Son is Essential, not a matter of personal opinion."