If you set them to wander they will harvest from any bushes or trees they come across, allowing you to passively collect huge quantities of fiber and thatch for crafting, aswell as berries for brews, beer, and keeping your animals fed. Also good for clearing out an area for building.
So I tamed one on my 2nd day on ark. It was a level 90. It is definitely helpful for people just starting out because if you set it to wander it collects a good amount of fiber, berries, wood, and thach. I recommend it to anyone starting out because it can be a great help getting those resources that you need.