<p>Thermoelectric (TE) materials possess the ability to convert heat into electricity and harness wasted heat. To build high-performance TE devices, it is essential to focus on superior TE materials through various strategies. Advancing high-performance TE devices can expand the TE application market and stimulate further research in TE materials. The researchers should concentrate their strategies on enhancing electrical conductivity while preserving the Seebeck coefficient. This review highlights innovative strategies to achieve high-performance TE materials and discusses about the fabrication techniques to synthesize the best suitable metal oxide for commercial TE materials. In the present work many recent achievements in the field of metal oxide based TEs have also discussed. The future trend is to synergistically optimize and integrate all effective factors to enhance TE performance, making highly efficient TE materials and devices more beneficial in everyday life.</p>