What are the roles of a forerunner according to the Bible?

The Bible describes three fundamental roles of a forerunner, particularly seen in the life and mission of Jesus. First, a forerunner carries a message, as illustrated in 2 Samuel 18 with Cushi delivering the good news to King David. Jesus, as our forerunner, brings the ultimate message of victory over sin, death, and hell. Secondly, a forerunner prepares the way; through His sacrificial death and resurrection, Jesus opens access to the Father, enabling our prayers and praises (Hebrews 10:19-20). Finally, a forerunner reserves a place for those who follow; Jesus assures us that He has prepared a place for His people in heaven, signifying our inheritance as children of God.