It doesn't let you control the animal, just make the animal friendly towards you.
Example. You are walking through the woods when a wolf starts bounding towards you ready to attack. You used this skill, and the wolf stops their attack, and trusts you. You can now pet the wolf, give it a cookie, and go on your way.
Example 2: You are sneaking into a cave. There a giant bear, who was sleeping is about to wake up. Right beyond him is a chest of gold. You befriend the bear. Now if the bear doesn't care about the chest, doesn't see it as anything but environment, you are free to enter the cave and loot the chest. As you leave, you pet the bear and give it a honeycake and go on your way.
-OOG Michael Smith