Stellar flares are sudden, intense bursts of electromagnetic radiation across a wide range of wavelengths, from X-rays to radio waves, occurring on many stars with outer convection zones. These flares are analogous to solar flares, which impact Earth's technological systems. While solar flares are relatively modest in energy compared to stellar flares, both are believed to originate from the catastrophic release of magnetic energy in the stellar atmosphere. This review summarizes recent research on stellar flares, focusing on observational results, thermal and nonthermal processes, and modeling approaches. It highlights the importance of stellar flares in understanding exoplanet habitability and space weather, as well as their prevalence in data from the Kepler mission. The review discusses various aspects of stellar flares, including flare rates, light curve analyses, multi-wavelength spectral observations, and atmospheric modeling. It also addresses the physical processes involved in flare generation, such as magnetic reconnection, particle acceleration, and energy transport. The review emphasizes the need for further research to better understand the spectrum, origin, and time evolution of flare radiation. It concludes with key questions that remain unresolved in stellar flare research, including the mechanisms behind flare energy release and the role of magnetic fields in flare dynamics. The review also provides an overview of the standard solar flare model, which is widely used to interpret stellar flares. It discusses the physical processes involved in solar flares, including magnetic reconnection, particle acceleration, and energy transport, and highlights the importance of these processes in understanding stellar flares. The review also addresses the role of stellar flares in the search for life elsewhere in the universe and their impact on exoplanet atmospheres. The review concludes with a discussion of the future directions in stellar flare research, including the need for more detailed modeling and observational studies.Stellar flares are sudden, intense bursts of electromagnetic radiation across a wide range of wavelengths, from X-rays to radio waves, occurring on many stars with outer convection zones. These flares are analogous to solar flares, which impact Earth's technological systems. While solar flares are relatively modest in energy compared to stellar flares, both are believed to originate from the catastrophic release of magnetic energy in the stellar atmosphere. This review summarizes recent research on stellar flares, focusing on observational results, thermal and nonthermal processes, and modeling approaches. It highlights the importance of stellar flares in understanding exoplanet habitability and space weather, as well as their prevalence in data from the Kepler mission. The review discusses various aspects of stellar flares, including flare rates, light curve analyses, multi-wavelength spectral observations, and atmospheric modeling. It also addresses the physical processes involved in flare generation, such as magnetic reconnection, particle acceleration, and energy transport. The review emphasizes the need for further research to better understand the spectrum, origin, and time evolution of flare radiation. It concludes with key questions that remain unresolved in stellar flare research, including the mechanisms behind flare energy release and the role of magnetic fields in flare dynamics. The review also provides an overview of the standard solar flare model, which is widely used to interpret stellar flares. It discusses the physical processes involved in solar flares, including magnetic reconnection, particle acceleration, and energy transport, and highlights the importance of these processes in understanding stellar flares. The review also addresses the role of stellar flares in the search for life elsewhere in the universe and their impact on exoplanet atmospheres. The review concludes with a discussion of the future directions in stellar flare research, including the need for more detailed modeling and observational studies.