Spintronics aims to efficiently manipulate electron spin for high-speed, low-power nanodevices. A key factor is the relativistic interaction between electron spin and orbital motion, but the properties of orbital angular momentum (OAM) have been underexplored. Recent studies show that OAM can be non-zero without spin-orbit coupling, leading to the emergence of orbitronics, which uses OAM to manipulate magnetic devices. This review discusses recent developments in orbitronics and their implications for spintronics. Spin-orbit coupling (SOC) is crucial for spin dynamics, inducing spin splitting and spin Berry curvature. However, most studies have focused on spin and orbital degrees of freedom separately. Recent theoretical work shows that OAM can be generated by an external electric field, leading to the orbital Hall effect (OHE), which is the orbital counterpart of the spin Hall effect. These findings challenge the belief that OAM is quenched in solids unless induced by SOC. Theoretical studies have shown that OAM can be non-zero in systems with broken inversion symmetry, leading to the orbital Rashba effect. This effect generates orbital current, known as the orbital Edelstein effect (OEE). Experimental advances have confirmed these effects, demonstrating the OHE and OEE in various materials, including transition metals, two-dimensional electron gases, and superconductors. The OHE and OEE have been experimentally detected through orbital torque and orbital accumulation. Orbital torque is generated by injecting orbital current into a ferromagnet, converting it to spin current and inducing torque. Orbital accumulation is measured via optical techniques, such as the magneto-optical Kerr effect. Future research in orbitronics aims to fully harness OAM for spintronics. Challenges include understanding OAM relaxation mechanisms and improving orbital-to-spin conversion efficiency. Materials with high conversion efficiency, such as topological insulators and semimetals, are being explored. Additionally, the role of orbital physics in strongly correlated materials is gaining attention, with potential applications in quantum information processing. Orbitronics has the potential to complement spintronics, offering new opportunities in device applications and fundamental research. The study of orbital physics in various systems, including phonons and magnons, suggests its broader applicability beyond electrons. This review highlights the growing importance of orbitronics in advancing spintronics and related fields.Spintronics aims to efficiently manipulate electron spin for high-speed, low-power nanodevices. A key factor is the relativistic interaction between electron spin and orbital motion, but the properties of orbital angular momentum (OAM) have been underexplored. Recent studies show that OAM can be non-zero without spin-orbit coupling, leading to the emergence of orbitronics, which uses OAM to manipulate magnetic devices. This review discusses recent developments in orbitronics and their implications for spintronics. Spin-orbit coupling (SOC) is crucial for spin dynamics, inducing spin splitting and spin Berry curvature. However, most studies have focused on spin and orbital degrees of freedom separately. Recent theoretical work shows that OAM can be generated by an external electric field, leading to the orbital Hall effect (OHE), which is the orbital counterpart of the spin Hall effect. These findings challenge the belief that OAM is quenched in solids unless induced by SOC. Theoretical studies have shown that OAM can be non-zero in systems with broken inversion symmetry, leading to the orbital Rashba effect. This effect generates orbital current, known as the orbital Edelstein effect (OEE). Experimental advances have confirmed these effects, demonstrating the OHE and OEE in various materials, including transition metals, two-dimensional electron gases, and superconductors. The OHE and OEE have been experimentally detected through orbital torque and orbital accumulation. Orbital torque is generated by injecting orbital current into a ferromagnet, converting it to spin current and inducing torque. Orbital accumulation is measured via optical techniques, such as the magneto-optical Kerr effect. Future research in orbitronics aims to fully harness OAM for spintronics. Challenges include understanding OAM relaxation mechanisms and improving orbital-to-spin conversion efficiency. Materials with high conversion efficiency, such as topological insulators and semimetals, are being explored. Additionally, the role of orbital physics in strongly correlated materials is gaining attention, with potential applications in quantum information processing. Orbitronics has the potential to complement spintronics, offering new opportunities in device applications and fundamental research. The study of orbital physics in various systems, including phonons and magnons, suggests its broader applicability beyond electrons. This review highlights the growing importance of orbitronics in advancing spintronics and related fields.