Topological materials are a class of materials that exhibit unique electronic properties due to their non-trivial topology. These materials are characterized by the presence of protected surface states or edge states that are robust against disorder and other perturbations. This topological protection arises from the underlying symmetry and topology of the material's electronic band structure. Topological materials have attracted significant interest in the field of condensed matter physics due to their potential applications in electronic devices, quantum computing, and spintronics. They include topological insulators, which are insulating in the bulk but conductive on the surface, as well as topological semimetals and topological superconductors. Research in topological materials is focused on understanding their electronic properties, exploring new materials with topological properties, and developing techniques to manipulate and control these properties for technological applications. The field continues to grow rapidly, with new discoveries and theoretical advances pushing the boundaries of our understanding of topological materials.