Unless the Lord protects a city, guarding it with soldiers will do no good. (Psalms 127:1) He gives his angels charge over us. That means he commands his angels to take care of us. Hebrews 1:14 says that the angels are spirits who serve God and are on assignment to continuously watch over those who trust in him. They set up camp around us(Psalms 34:7) The angels that encamp around those who trust in God also deliver them from trouble (Psalms 34:7)
They deliver us from and help us overcome the many obstacles of life that may threaten us with harm.
They are our security detail
We are their assignment to protect.