Hides spammy, automated messages about hunters' Wild Spirits, preventing them from showing up in your chat frame. This does not affect the chat bubbles. This currently suppresses messages from the following weakauras:
Of course, this weakaura aims not to hide "real" chat messages from any players.
If you are a tank, I suggest that you download a separate weakaura to show when a hunter in your group uses Wild Spirits.
P.S. I hate you, June.