A weld is a method used to join two or more pieces of metal together by melting them at their edges and allowing them to cool and solidify. This process creates a strong bond, making welded joints essential in construction, manufacturing, and repair work. Different welding techniques, such as MIG welding and TIG welding, are used depending on the materials and the desired strength of the joint. Welding can be performed using various energy sources, including electricity, gas, or lasers. Safety is crucial during welding, as the process generates intense heat and bright light, which can be hazardous. Proper protective gear, such as helmets and gloves, is necessary to prevent injuries.