Why is believer's immersion important for Christians?

Believer's immersion is a biblically mandated ordinance that signifies a person's public profession of faith in Jesus Christ. The New Testament repeatedly demonstrates that true gospel assemblies are founded upon this practice, as seen in passages like Matthew 28:19-20, which commands baptizing believers. Churches that do not adhere to this ordinance cannot be considered evangelical, and consequently, the members of such churches are likewise not recognized as evangelical. The importance of believer's immersion lies in its role as an identification with Christ's death, burial, and resurrection, affirming one's faith and commitment to the gospel.