How do we understand the phrase 'good news' in relation to Jesus Christ?

'Good news,' rooted in the Greek word 'euangelion,' is intrinsically linked to the life and work of Jesus Christ. The angelic proclamation to the shepherds in Luke 2:10-11 announces, 'I bring you good tidings of great joy which shall be to all people; for unto you is born this day in the city of David a Savior, who is Christ the Lord.' This encapsulates the essence of the gospel; it is the declaration of Jesus as the long-awaited Savior. The good news is not merely about moral improvement or religious observance, but about God's initiative in bringing salvation through Christ's work on the cross, fulfilling the covenant promises, and ensuring reconciliation for all who believe.