Topological materials, particularly Weyl semimetals (WSMs), are quantum materials characterized by surface states arising from the topology of their bulk band structures. WSMs exhibit linear dispersion around nodes called Weyl points, analogous to graphene in three dimensions. The TaAs family is a key example for understanding WSMs, showcasing Fermi arcs and chiral magnetic effects. Type-II WSMs, with tilted Weyl cones, have been identified in materials like WTe₂ and MoTe₂. These materials display unique properties such as large magnetoresistance and superconductivity. Heusler compounds, a multifunctional class, include both topological insulators and magnetic WSMs, offering versatile platforms for exploring topological effects. The chiral anomaly in WSMs leads to negative magnetoresistance and anomalous Hall effects. Recent studies highlight the potential of WSMs in spintronics and quantum technologies, with applications in high-speed electronics and catalysis. The field is rapidly expanding, with ongoing research into new materials and their properties.Topological materials, particularly Weyl semimetals (WSMs), are quantum materials characterized by surface states arising from the topology of their bulk band structures. WSMs exhibit linear dispersion around nodes called Weyl points, analogous to graphene in three dimensions. The TaAs family is a key example for understanding WSMs, showcasing Fermi arcs and chiral magnetic effects. Type-II WSMs, with tilted Weyl cones, have been identified in materials like WTe₂ and MoTe₂. These materials display unique properties such as large magnetoresistance and superconductivity. Heusler compounds, a multifunctional class, include both topological insulators and magnetic WSMs, offering versatile platforms for exploring topological effects. The chiral anomaly in WSMs leads to negative magnetoresistance and anomalous Hall effects. Recent studies highlight the potential of WSMs in spintronics and quantum technologies, with applications in high-speed electronics and catalysis. The field is rapidly expanding, with ongoing research into new materials and their properties.