Metal additive manufacturing (MAM) is a growing technology that has been gaining significant attention in recent years. This process uses fine metal powder to develop complex and high strength parts that are designed either by employing a CAD data or by taking a 3D scan of the object. MAM offers many merits over conventional manufacturing methods, such as the ability to produce highly complex shapes with intricate internal features, reduce material waste, customization features, and offer greater design flexibility. The application of MAM is expanding across various industries, such as aerospace, automotive, military, biomedical, and consumer goods. In the medical sector, this technique is being used to create customized implants, surgical devices, etc. Additionally, MAM is being used to create intricate jewelry designs, fashion accessories, and sculptures in the art and fashion industries. However, there are still many threats to be addressed in the application of MAM, such as the need for improved material properties, production speed, and cost-effectiveness. Despite these challenges, the potential for MAM to revolutionize the manufacturing industry is immense, and it is expected to play a significant role in the future of manufacturing. Thus, the aim of this chapter is to exhibit a comprehensive overview of different metal additive manufacturing processes, background, material used, and their applications in distinct sectors. Finally, the merits, demerits, industrial applications, challenges, and opportunities of MAM are discussed.