Clouds are primarily in the gaseous state of matter. They are formed when water vapor in the air cools and condenses into tiny water droplets or ice crystals. These droplets and crystals are so small and light that they float in the air, creating the visible formations we recognize as clouds.
However, clouds can also contain water in the liquid state (as tiny droplets) and sometimes even in the solid state (as ice crystals), especially in higher altitudes where temperatures are colder. The combination of these states of matter within clouds is what makes them so dynamic and ever-changing.