The three faces represent the trinity of creation.
Past. Present. Future.
The Goat and its worship are tied to the age of taurus. (just to say it simple, theres a LOT to learn about these two symbols)
I guess the movement is younger now and stuff, but back in "my days" we knew a lot more about ocultism than todays anons.
I recommend "Mystery Babylon" for the start, and dont forget the Bibliography ;)
http://hourofthetime.com/milton-william-bill-cooper-mp3-collection/part-2-episodes-201-through-400-complete-bill-cooper-hour-of-the-time-mp3-collection/
(Generally speaking: Occultists laugh about these threads, because you didnt dig deep enough, you dont penetrate the shields of deceptions woven over centuries. Grab old books before you go on YouTube and shit)