TL;DR: A rocking toilet is usually a quick fix. Tighten the closet bolts first, and if it still moves, add shims and seal the base with caulk. But if you spot water pooling, catch a sewer smell, or the floor feels soft, the wax ring or flange has gone, and...
Find Silent Leaks: The Food Coloring Toilet Test
Most homeowners don't realize their toilet is silently wasting water until they see the water bill spike. You can't hear it, you can't see it flowing, but somewhere inside your tank, a slow leak is happening every single day. The easiest way to catch this problem before it becomes expensive...