What does it mean to be a mediator of the New Covenant?

Christ as the mediator of the New Covenant means He is the appointed representative who fulfills all the necessary conditions for salvation on behalf of His people. Hebrews 9:15 states that by means of Christ's death, those who are called may receive the promise of eternal inheritance. This indicates that He has fulfilled the terms of the covenant through His sacrificial death, securing the redemption of His elect from sin. As mediator, Christ bridges the gap between God and humanity, ensuring that the promises of salvation are realized.