**8. Conclusions**

The concept of WAAM is now well spreading across the globe due to its wide acceptability by leading industries and crucial sectors for the fabrication of stainless steel and other metal components of interest at good cost benefits but without compromising the quality. This text clearly states the fundamentals of WAAM. The AM technique was well illustrated followed by its different classifications and techniques. The working of Wire Arc Additive Manufacturing (WAAM), a variant AM process has been written in lucid manner. Classifications of WAAM have been given with importance of familiar and capable welding processes experimented worldwide followed by synonym terms practiced across the different research group nations. The welding processes frequently used for WAAM have been well presented followed by various key welding process parameters. Moreover, the well-exercised materials of different alloy classifications have been detailed. As an example of fabrication, the details about the fabrication of metal component using GMAW based WAAM has been presented. Most common welding defects frequently occurred have been presented with the causes for easy understanding followed by some of the challenges for future to address for the successful fabrication of variety of metal components using this welding based AM. It is believed that the information furnished here would be supportive for the budding engineers and industry personnel who want to learn the AM fabrication using WAAM.
