Gas metal arc welding (GMAW) is also often referred to as Metal Inert Gas (MIG), actually MIG is one type of GMAW itself. In this method, a long roll of electrodes is used which melts together with the metal to create a weld pool. The continuously melting electrode provides a constant flow of weld which helps prevent contamination and messy welds. This method is a welding method that is quite easy to learn because it is easy to control the speed of the welding wire, and does not have to change it continuously unlike SMAW.

This method is also one of the most efficient in the world of welding. Because it can quickly combine metal with a short waiting time. But the equipment for this GMAW method is quite expensive when compared to the other two methods.