The chapter discusses the potential of graphene in photonics and optoelectronics, highlighting its unique optical and electronic properties. Graphene, with its high mobility, optical transparency, flexibility, robustness, and environmental stability, has been explored for various applications. The linear dispersion of Dirac electrons in graphene enables ultra-wide-band tunability, making it suitable for broadband applications. Recent advancements include solar cells, light-emitting devices, touch screens, photodetectors, and ultrafast lasers. The chapter reviews the electronic and optical properties of graphene, including its linear optical absorption, saturable absorption, luminescence, and production methods. It also discusses the potential of graphene in transparent conductors, photovoltaic devices, light-emitting diodes, photodetectors, touch screens, flexible smart windows, saturable absorbers, ultrafast lasers, optical limiters, optical frequency converters, and THz devices. The chapter emphasizes the advantages of graphene over traditional materials like ITO in terms of cost, flexibility, and performance.The chapter discusses the potential of graphene in photonics and optoelectronics, highlighting its unique optical and electronic properties. Graphene, with its high mobility, optical transparency, flexibility, robustness, and environmental stability, has been explored for various applications. The linear dispersion of Dirac electrons in graphene enables ultra-wide-band tunability, making it suitable for broadband applications. Recent advancements include solar cells, light-emitting devices, touch screens, photodetectors, and ultrafast lasers. The chapter reviews the electronic and optical properties of graphene, including its linear optical absorption, saturable absorption, luminescence, and production methods. It also discusses the potential of graphene in transparent conductors, photovoltaic devices, light-emitting diodes, photodetectors, touch screens, flexible smart windows, saturable absorbers, ultrafast lasers, optical limiters, optical frequency converters, and THz devices. The chapter emphasizes the advantages of graphene over traditional materials like ITO in terms of cost, flexibility, and performance.