It's not nearly as difficult as it sounds, even if it seems daunting.
You know what the second- and third-axis adjustments are on your bow sight, right? No? Well, simply put, the second-axis is the rotation of the sight ring. Third-axis is the angle of the face of the sight. Why does this matter?
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It wasn't that long ago that sights weren't offered with this level of adjustability. And, truth be told, you can get along just fine without it in many situations. But the additional adjustments offered in second- and third-axis leveling can help sort out a number of accuracy issues that tuning alone can't fix.
Torque issues can be a bear to solve but the ability to adjust your sight to compensate for the natural torque that occurs from even a proper grip can be a big bonus. The same can be said for angled shooting. Whether it's from a treestand or in steep terrain, axis-leveling can help make shooting accurately much simpler.
Once you understand the basics of how second- and third-axis systems work, adjusting is easier. Most sights feature click-positive adjustability as well for finer precision.