Growl

It functions just like the Warrior's Taunt, which operates in the following manner:

1: sets your current threat equal to the highest player on the mob's threat list.
2: forces it to attack you.

As Taunt, Growl can be resisted by the mob, and certain mobs are also immune.

Taunt for Druids in Bear Form. Make sure to only use this to get a mob's attention which is attacking a party member, or else this ability is wasted.

Some useful insight regarding the game-mechanics of a feral's growl abililty:

17% chance to miss, subjected to *spell* hit mechanics
1% reduction in chance to miss with spells at lvl80 = 26.23 hit rating

- With glyph + debuff (FF from balance druids or debuff from shadow priests):

17% - 8% (glyph) - 3% (debuff) = 6%

6% = 6 x 26.23 = 158 hit rating

- Without glyph, but with debuff:

17% - 3% = 14%

14% = 14 x 26.23 = 262.3 + 104.92 = 368 hit rating

- With glyph, without debuff:

11% = 11 x 26.23 = 262.3 + 26.3 = 289 hit rating

Hope this helps