Interfacial chemistry is the specialized field of chemistry dedicated to investigating the physical and chemical phenomena occurring at the boundaries (interfaces) between different bulk phases, such as solid-liquid, liquid-gas, or liquid-liquid. This area explores the unique properties, structures, dynamics, and reactions that arise specifically at these interfacial regions, which critically govern processes like adsorption, wetting, adhesion, detergency, emulsion and foam formation, catalysis, and charge transfer in electrochemical systems, underpinning numerous natural and industrial applications.