John 1:41

Andrew sought to bring his own brother to Jesus and was successful in doing so. Obviously both of them wanted to discover the Messiah whom the Old Testament prophets had predicted and whom Daniel’s timetable encouraged them to believe would appear soon (Daniel 9:25). We should not conclude, however, that because Andrew believed that Jesus was the Messiah he also believed that He was God. He may have believed this, but all the evidence in the Gospels points to the disciples learning of Jesus’ deity after they had been with Him for some time (cf. Matthew 16:16; Mark 8:29; Luke 9:20). Probably Andrew thought of Jesus as a great prophet who was the messianic deliverer of Israel.

The title "Messiah" means "anointed one." The anointed one in Israel was originally any anointed priest or king who led the people. As time passed God gave prophecies of a coming Davidic king who would liberate the Israelites and establish God’s rule over the whole earth (e.g., 2 Samuel 7; Psalms 2; Psalms 110). Thus the idea of a coming anointed one crystallized into the title "Messiah."