I'm not going to lie...I remember learning about this section as an 11 or 12 year old thinking it would be vital that I learn how to tell the difference between an angel, a spirit and the adversary pretending to be an angel...Turns out I haven't had to use that knowledge as frequently and my 11 year self thought I would. However, we do have the chance, every day of our lives, to witness the angels on earth as they try to bless and share the love of God with those around them. 
Holland
https://www.churchofjesuschrist.org/study/general-conference/2008/10/the-ministry-of-angels?lang=eng