Metal inert gas (MIG) welding is a versatile and widely used welding process in various industries due to its efficiency, speed, and ability to produce high-quality welds. However, achieving optimal weld quality and performance relies heavily on selecting appropriate welding parameters, wire materials, and techniques. This review paper aims to provide a comprehensive comparison of MIG welding parameters, wire materials, and techniques to aid welding practitioners, researchers, and engineers in making informed decisions. The paper begins by discussing the significance of MIG welding parameters such as voltage, wire feed speed, travel speed, shielding gas flow rate, and joint design. Each parameter’s influence on weld quality, penetration depth, and efficiency is analyzed, along with the recommended ranges for different applications. Subsequently, the review delves into the diverse range of wire materials available for MIG welding, including various types of filler wires such as carbon steel, stainless steel, aluminum, and special alloys. This review provides an in-depth explanation of the properties, advantages, and limitations of various wire materials, enabling readers to assess their suitability for specific welding applications and materials. Additionally, it examines various MIG welding techniques such as pulse MIG, spray MIG, and short-circuit MIG, detailing the principles, benefits, and applications of each method. This analysis offers valuable insights for optimizing weld performance and productivity. The paper concludes by synthesizing key findings and offering recommendations for selecting the most suitable MIG welding parameters, wire materials, and techniques based on the desired weld quality, material properties, and specific application requirements.