Why is the angel of the Lord significant in salvation?

The angel of the Lord is significant in our understanding of salvation because He embodies God's immediate provision for sin and guidance. Right after giving the law, which demands perfection and exposes human inability, God reassures His people by introducing His angel, who foreshadows Christ. This highlights the grace of God, indicating that before we even recognized our need for salvation, God had already sent the remedy in His Son. The angel declares that through Him, believers will find strength, security, and guidance along their journey to the promised inheritance.