MIG Wire (Metal Inert Gas Wire), also known as filler wire or electrode wire, is a key component in the MIG welding process. It serves as the consumable material that melts to form the weld during the welding process. MIG welding, also called Gas Metal Arc Welding (GMAW), involves feeding this wire through a welding gun while simultaneously applying a shielding gas to protect the weld from atmospheric contamination.