Welding is the process of using electrical current to superheat and melt metal so that you can join two pieces of metal together. There are several ways to weld, but the two most popular ways to weld at home include gas metal arc welding, or MIG welding, and arc welding, otherwise known as stick welding. While welding can seem intimidating at first, it's actually fairly simple once you take the proper safety precautions and practice using your welding machine.