The article "Ultrafast Optical Manipulation of Magnetic Order" by Andrei Kirilyuk, Alexey V. Kimel, and Theo Rasing reviews the progress in understanding and manipulating magnetic order using ultrashort laser pulses. The authors discuss the interaction of subpicosecond laser pulses with magnetically ordered materials, highlighting the challenges and potential applications in spintronics, data storage, and quantum computation. They explore the mechanisms behind the manipulation of magnetic order, including the interaction of photons with charges, spins, and lattice, and the transfer of angular momentum between these components. The paper covers various experimental techniques, such as pump-and-probe methods, optical, ultraviolet, far-infrared, and X-ray probes, and discusses the thermal effects of laser excitation, nonthermal photomagnetic effects, and nonthermal optomagnetic effects. The authors also delve into the theoretical considerations, including the Landau-Lifshitz-Gilbert equation, finite temperature effects, and the interaction of photons with spins. The review aims to provide a systematic overview of the field, distinguishing the effects of light on net magnetization, magnetic anisotropy, and magnetic structure, and drawing conclusions about the role of different angular momentum reservoirs in ultrafast optical manipulation of magnetism.The article "Ultrafast Optical Manipulation of Magnetic Order" by Andrei Kirilyuk, Alexey V. Kimel, and Theo Rasing reviews the progress in understanding and manipulating magnetic order using ultrashort laser pulses. The authors discuss the interaction of subpicosecond laser pulses with magnetically ordered materials, highlighting the challenges and potential applications in spintronics, data storage, and quantum computation. They explore the mechanisms behind the manipulation of magnetic order, including the interaction of photons with charges, spins, and lattice, and the transfer of angular momentum between these components. The paper covers various experimental techniques, such as pump-and-probe methods, optical, ultraviolet, far-infrared, and X-ray probes, and discusses the thermal effects of laser excitation, nonthermal photomagnetic effects, and nonthermal optomagnetic effects. The authors also delve into the theoretical considerations, including the Landau-Lifshitz-Gilbert equation, finite temperature effects, and the interaction of photons with spins. The review aims to provide a systematic overview of the field, distinguishing the effects of light on net magnetization, magnetic anisotropy, and magnetic structure, and drawing conclusions about the role of different angular momentum reservoirs in ultrafast optical manipulation of magnetism.