Synthetic surfactants are a wide range of substances that help lower the tension at the surface between different phases. Their unique molecular structure and remarkable surface activity have rendered them indispensable in several sectors and have revolutionized many technical and industrial processes. This chapter provides an in-depth discussion of synthetic surfactants, detailing their various types, physicochemical properties, and diverse applications to pharmaceuticals, cosmetics, agriculture, food processing, petroleum recovery, environmental remediation, and micellar catalysis. Recent advances, such as stimuli-responsive and multifunctional surfactants, have also been emphasized for their prospective applications in advanced sectors such as medication delivery, nanotechnology, and smart material creation. This study highlights the crucial roles of synthetic surfactants in modern industries through their established and novel applications. Traditional surfactants, often derived from petrochemicals, are persistent in the environment and can harm aquatic ecosystems. This has led to a growing emphasis on creating alternatives that are both effective and environmentally benign.