What does it mean that Christ is the mediator of the covenant?

In His role as the mediator of the covenant, Christ serves as the connecting point between God and humanity, fulfilling the terms of the covenant through His perfect obedience and sacrificial death. This mediatorial work encompasses the entire plan of salvation, wherein Christ offers Himself as the perfect sacrifice that satisfies God's justice. By mediating this new and better covenant, Jesus guarantees the blessings promised to His elect and intercedes for us, ensuring that we are kept secure in our salvation. This aspect of His ministry enhances our understanding of grace, as it underscores that our acceptance before God is dependent on Christ alone and not on our merits, magnifying the grace of God.