What does it mean that Christians are a royal priesthood?

The concept of Christians as a royal priesthood, found in 1 Peter 2:9, indicates that all believers have the privilege and responsibility to serve God and intercede for others. This priesthood does not belong solely to a designated group but extends to every member of the church. As priests, Christians are called to offer spiritual sacrifices, including prayers and praises, to God. Moreover, their prayers actively participate in God's redemptive work in the world, allowing them to reign spiritually through their prayer life. This collective priesthood underscores the dignity and responsibility of believers in approaching God and representing His interests on earth.