Aerosol-cloud interactions refer to the complex relationship between atmospheric aerosols (tiny solid or liquid particles suspended in the air) and clouds. Aerosols can serve as cloud condensation nuclei, providing surfaces for water vapor to condense and form cloud droplets. They can also influence cloud microphysical properties, such as droplet size and concentration, which in turn affect cloud formation, lifetime, and precipitation. Aerosols can have both direct and indirect effects on clouds. Direct effects involve interactions between aerosol particles and clouds, while indirect effects involve interactions between aerosols, clouds, and radiation. Understanding aerosol-cloud interactions is important for predicting changes in cloud formation, precipitation patterns, and climate variability. Research in this area often involves studying the physical and chemical properties of aerosols and their impacts on cloud formation and behavior through a combination of observational, experimental, and modeling approaches. Ultimately, a better understanding of aerosol-cloud interactions can improve climate models and projections of future climate change.