Google “What is soldering?” and thousands of answers will flood your screen in less than 1 second. Consider this your quick and easy guide to soldering as it relates to electronics. Soldering is a fundamental technique in electrical manufacturing that fills two needs with one deed. First, it serves as a strong mechanical connection between wires and electrical components. Simultaneously, the solder material acts as a conductor that carries an electrical charge from one terminal to another.
Generally speaking, the act of soldering involves melting solder material over the top of a joint (e.g., between two terminals, wires or switches) to bond the two components and complete the electrical circuit.
Solder is not a glue, and soldering is not the same as welding or brazing. Though a fast, convenient method used to affix metal components permanently, soldering uses much lower temperatures than welding or brazing, which makes the technique well-suited for delicate electronic environments.