Why is there water on the bottom of the refrigerator?

Theres a clog in the condenser drainage line. Causing the water to back up and leak. Clean the line to unclog and clean remaining water. Sometimes if the freezer freezes up, it'll need to defrost. Which would also result in water under the fridge. I'd definitely would check line first.

It is usually caused by a clogged defrost drain or a leaky door seal that lets in humid air. A blocked drain prevents condensation from draining and evaporating, leading to water pooling inside the fridge. A damaged door seal can also cause excess moisture to condense and collect as water. Other possible causes include a cracked drain pan, a water line leak, or incorrect temperature settings.