Magnesium is one of the lightest structural metals currently available, and it can replace conventional alloys in mass-saving applications while still offering superior stiffness and strength. The presence of reinforcing components inside the metallic matrix has a substantial impact on stiffness, specific strength, wear behaviour, damping behaviour, and creep qualities when compared to conventional engineering materials. Due to their superior physical and mechanical characteristics, low density, and suitability for a variety of applications, magnesium metal matrix composites are ideal materials. This paper describes how to choose an acceptable technique and its process parameters for the synthesis of magnesium-based metal matrix composites (MMCs). Additionally, it gives a general summary of how different reinforcements affect magnesium and its alloys, highlighting both their benefits and drawbacks.