Light is always a fascinating subject to humankind from the beginning of the modern age. It fulfils the purpose of sight and is used for various purposes such as in decorations, medical and many other research applications. Laser is one of the most widely used technologies based on the properties and phenomenon of light. Laser beams are always considered as supporting tools in the field of machining. It is merely considered a heat source that accelerates the machining operation. When a laser beam falls on the material surface, there are always three possibilities: (i) transmission, (ii) reflection and (iii) absorption. Nowadays, several industries use CO2 Laser, Nd: YAG laser, fibre laser and diode laser in their manufacturing units for fabrication and material removal processes. This chapter discusses the various application of laser in machining operation. The ongoing evolution of laser technology and the development of other sophisticated assisting tools established laser material processing technology as one of the trusted allied manufacturing operations.