What does the Bible say about the baptism of John?

According to Mark 1:4-5, John's baptism was conducted in the wilderness and was a baptism of repentance for the remission of sins. It was not a different baptism from what believers practice today; rather, it represented believer's baptism. John the Baptist preached that those he baptized were confessing their faith in the coming Christ, who would later be the sacrifice for their sins. This baptism symbolizes acknowledgment of sin and the need for salvation, aligning with the concept that through Christ's work, believers are forgiven.