What happens to the mud if you leave it undisturbed for few hours or days?

If left undisturbed for a few hours or days, mud will begin to settle and compact. The heavier particles will sink to the bottom, while lighter materials may remain suspended or rise to the surface. This process can lead to a clearer liquid layer forming above the denser sediment at the bottom. Additionally, biological activity may increase, potentially leading to changes in the mud's composition over time.