What does it mean that Christ was made sin for us?

The phrase 'Christ was made to be sin for us' signifies that Christ took upon Himself the weight of our sins to secure our reconciliation with God. This profound theological truth, highlighted in 2 Corinthians 5:21, reveals that while Christ was sinless, He bore our transgressions and faced the divine judgment meant for us. Thus, this sacrificial act allowed for the removal of our sins and the imputation of His righteousness upon us. It illustrates the crux of the gospel message—that our faith rests not merely on forgiveness but on being made righteous through the perfect work of Christ. Through His crucifixion, a divine transaction occurred; our sins were charged to Him, and His righteousness is credited to us, ensuring our standing before God.