https://www.hunkmachining.com/stick-welding-shielded-metal-arc-welding-smaw.html
SMAW (Shielded Metal Arc Welding) refers to manual arc welding, which is an electric arc welding method using manually operated welding rods.
SMAW uses welding rod and workpiece as two electrodes. During welding, the workpiece is locally melted due to the high temperature and blowing force of the arc. Then an oval pit filled with liquid metal is formed on the workpiece, and this pit is called the molten pool. With the movement of the welding rod, the weld will be formed after the molten pool cools and solidifies.