Why is it significant that angels proclaimed Jesus' birth?

The announcement of Jesus' birth by angels serves to glorify God and highlight the importance of Christ's coming into the world. In Luke 2:10-12, the angel declares 'good tidings of great joy', which signifies the purpose of Jesus' arrival as the Savior. The multitude of heavenly hosts praising God signifies the cosmic celebration over the incarnation of Christ, illustrating that His birth is not merely a regional event but a pivotal moment in God’s redemptive history. This reinforces the understanding that salvation is a divine act lauded by all of heaven.