What is the main characteristic of stratus clouds?

Stratus clouds are primarily characterized by their flat, uniform appearance that covers the sky in a layer, resembling a blanket. This formation results from moist air rising and cooling, causing condensation to occur at a relatively low altitude. Unlike cumulus clouds, which are puffy and can appear white and fluffy, stratus clouds are typically gray and may produce light precipitation such as drizzle. Their expansive coverage can lead to overcast conditions, which is a distinct feature of this cloud type. The flat morphology, rather than vertical development, is crucial in identifying stratus among other cloud formations.