Smart textiles are also referred to as electronic textiles or e-textiles, which have emerged as any enabling technology dealing with active electronic elements integrated into conventional textile materials in several industries. This review article describes recent development about smart textiles toward their materials, applications, and challenges with respect to their development. Further synthesis of the findings from different research papers has established that smart textiles have huge potentials with regard to use cases in healthcare, sports, fashion, and environmental monitoring. It concludes by pointing out the likely future direction of research and development in this ever-changing field.