Why put cut lemon in fridge?

Why would someone choose to put a cut lemon in the fridge? Is it to preserve the freshness and flavor of the lemon? Does it help to prevent bacterial growth? Or is there another reason entirely? Perhaps it's a trick to keep the lemon from browning or to make it easier to slice and juice later. Whatever the reason, it's intriguing to consider the various possibilities and the potential benefits of this simple act. So, what's the real reason behind putting a cut lemon in the fridge?