Read the series so far.
Jesus is the Messiah. He is also the Son of God.
The beginning of the gospel of Jesus Christ, the Son of God (Mark 1:1).
It’s another title. It describes something about who He is. In nerdy grammatical terms, it’s an appellation. Why is this title in the inspired Scripture? Well, on one level, it’s there because John Mark decided to put it there. On another level, however, it’s there because God wanted it to be there and the Holy Spirit moved Mark to include it. So, it’s probably a good idea to figure out what on earth it means, and to ponder what this title tells us about the Trinity.