Electrode welding / Stick welding is a manual arc welding process where an electric arc ignites between the used electrode and the metal as soon as they touch. The electrode melts and creates the weld on the workpiece.
Modern electrodes are typically made of a core rod and are flux coated. While welding the electrode's flux melts and protects the weld and workpiece with a slag from environmental influences. Once the weld has cooled, the slag can be removed.