Intercessory prayer is the act of praying on behalf of others. The role
of mediator in prayer was prevalent in the Old Testament, in the cases
of Abraham, Moses, David, Samuel, Hezekiah, Elijah, Jeremiah, Ezekiel,
and Daniel. Christ is pictured in the New Testament as the ultimate
intercessor, as a result, all Christian prayer becomes
intercession since it is offered to God through and by Christ. Jesus
closed the gap between us and God when He died on the cross. Because of
Jesus’ mediation, we can now intercede in prayer on behalf of other
Christians or for the lost, asking God to grant their requests
according to His will. “For there is one God and one mediator between
God and men, the man Christ Jesus” (1 Timothy 2:5).
“Who is he that condemns? Christ Jesus, who died—more than that, who
was raised to life—is at the right hand of God and is also interceding
for us” (Romans 8:34). (Source:Got Questions.org)