 Piezoelectric materials are smart materials that can convert mechanical pressure to electrical signals and vice versa. They are widely used in energy harvesting from vibrations, human motion, and mechanical loads. Piezoelectric transduction offers high scalability, simple device designs, and high power densities compared to other transducers. This review provides a comprehensive overview of recent developments in piezoelectric nanostructured materials, polymers, polymer nanocomposites, and piezoelectric films for energy harvesting applications. The progress in fabrication techniques, morphology, piezoelectric properties, energy harvesting performance, and fundamental mechanisms are discussed. Piezoelectric energy harvesters have emerged as a promising technology for wireless devices and self-powered sensors. However, challenges such as low efficiency and durability remain, and future prospects include the development of new materials and improved fabrication techniques. This article was authored by Susmriti Dasmahapatra, Pritam Chandan Mohapatra, Adryanis Indra Aria, and others. We are article.tv, links in the description below.