Useful in pvp as it has an ability to alert owner to any nearby enemy players and is signaled with its glowing horns. Also can assist in looking for dinos to tame as it has an ability to alert players to any max level dinos within its render distance.
The shine horn, unlike all of the other charge animals, is the only charge animal that can tame the seeker ( see seeker Dododex page for more info about taming). Fill a small enclosed area with about 30 plus shinehorns. Lure seeker into room and put shinehorns on full charge. Did this on official, it really does work. Hope this helps✌️