What is the primary purpose of using a soldering gun?

The primary purpose of using a soldering gun is to produce smooth electrical connections by melting solder and allowing it to flow into the joint between two electrical components. This solidifies to create a strong and conductive connection. While some soldering guns may have built-in illumination to help users see the work area better, this feature is secondary to the main function of creating electrical connections.

A soldering gun heats up to the necessary temperature to melt solder, allowing it to bond metals together effectively. This process is essential in electronics and electrical work to ensure that components are securely and correctly connected for optimal functionality. The other options, while related to soldering, do not capture the fundamental purpose of the tool.