What does it mean that Christ's death was vicarious?

The concept of a vicarious death indicates that Christ's sacrifice was not for Himself but for those He came to save. As seen in Isaiah 53:6, 'the Lord hath laid on him the iniquity of us all,' highlighting Christ's role as our substitute. His death took the place of the punishment we rightfully deserved. Vicarious atonement illustrates God's grace, demonstrating that unjustly, the sinless One would bear the sins of the guilty, thus providing a means of redemption. This is integral to understanding the holistic nature of salvation, where Christ’s substitution allows believers to be justified before God.